China steel structure museum.

Focusing on the protection of industrial heritage, popularization of scientific knowledge and patriotism education, the Steel Structure Museum aims to let the audience know the development course of steel structure in the world, the rising road of steel structure in China and the unique charm of steel structure civilization.

(A) the characteristics of patriotism education

The steel structure museum shows the whole development process of China’s steel structure related technology from ancient times leading, to modern backwardness, to modern rise, and then to contemporary leading, which helps the audience to understand the history of national conditions and inspire the national spirit; Collecting and exhibiting a number of precious collections that carry red genes, unite blue power and focus on green development, and digging deep into the information and historical stories behind them will help stimulate the enthusiasm of the audience and cultivate scientific ideas; The theme is steel structure. Steel structure technology, products and works are important carriers for China to practice the "Belt and Road Initiative", build a community of human destiny and serve human welfare, and are also important starting points for telling the story of China’s revival.

(2) Free opening to the outside world.

The steel structure museum began its trial operation on May 18, 2017, and is open to the public free of charge every Tuesday, Thursday and Saturday. On May 1, 2018, it was approved by the Guangdong Provincial Cultural Relics Bureau and officially listed in the national cultural and cultural system; It officially opened on November 2, 2018, and the opening hours were adjusted to six days a week from Tuesday to Sunday. By the end of 2020, it had received more than 50,000 visitors. The museum has also set up online services such as visit reservation, self-help audio guide, panoramic display, etc., providing public services such as guide maps, convenient umbrellas, drinking water, and protection measures for the disabled, and regularly giving special lectures on popular science for children.

(3) Guangji steel structure treasures

The steel structure museum has collected more than 1,000 pieces (sets) of different kinds and shapes from home and abroad. The representative collections include: iron cables of Luding Bridge in Sichuan, rivets of Eiffel Tower, steel members of World Trade Center Building in New York, specifications for steel bridges of state-owned railways in 11 years of the Republic of China, 20-year annals of Showa Steel Works, coal and stone lamps of herringbone bridge in Yunnan-Vietnam Railway, draft recommendation letter of History of Wuhan Bridge Project, rivets and cables of Golden Gate Bridge in the United States, and 3D printed steel structure nodes. At the same time, according to the cultural industry norms, a collection warehouse with protective conditions was built for collection storage, and a collection and warehouse management system was established, and collection of collections continued.

(D) In-depth academic research

The steel structure museum has carried out in-depth research on the collection and history, published the Catalogue of Fine Collection (the first series), and written more than 40 articles on the Collection. Summarize the experience of enterprises in organizing industry museums, participate in the discussion of provincial and municipal industry norms for many times, share the experience of running museums and popularizing science at different theme activities, and publish many papers.

(five) to carry out social education.

The steel structure museum attaches great importance to the education of students and children, actively innovates and takes the initiative to plan and develop a series of research courses on how steel structures are "tempered", and has published a primary school edition, and will continue to compile a junior high school edition and a senior high school edition; A total of 15 public welfare lectures on "Opening of the Steel Structure Museum" were held, benefiting more than 15,000 people online and offline; Continuously held the volunteer service of "Little Interpreter Training" and carried out thematic research activities, benefiting more than 6,000 students. Co-organized a number of public welfare activities such as "prefabricated building citizen experience activities", "millions of citizens see Shenzhen" and "listening to the story of reform and opening up in the museum" with the relevant Shenzhen Municipal Bureau.

(six) extensive publicity and reporting

The steel structure museum has established an official website and WeChat WeChat official account, designed and produced brochures and guide maps, and developed various cultural and creative products such as steel structure theme souvenir covers and commemorative coins. As the only cultural institution, the Steel Structure Museum appeared in Shenzhen’s new edition (2020) city publicity film.

(seven) the social evaluation is good.

The construction and opening up of the steel structure museum has been widely praised by industry experts and the public. It has been awarded the "National Primary and Secondary School Students’ Research and Practice Education Base" and is a member unit of the China Museum Association, the National Federation of Industrial Museums and china national youth palace association.

10 heavy projects in Xi ‘an High-tech Zone started collectively.

  Cctv news January 28th is the first day after the Spring Festival, and the main venue of key projects in the first quarter of 2023 in Shaanxi Province was held in the second phase of BYD New Energy Passenger Car Parts Project in Xi ‘an High-tech Zone. On the same day, 10 heavy projects covering new energy vehicles, 5G, intelligent manufacturing and other industries and business supporting fields in Xi ‘an High-tech Zone were started simultaneously.

  It is understood that the concentrated start-up projects in the High-tech Zone as a whole have obvious characteristics such as large investment, high technology content, good economic benefits and strong employment-promoting ability. Among them, in the field of new energy automobile industry, the newly-started BYD New Energy Passenger Car Parts Phase II project has a total investment of 13 billion yuan. By purchasing equipment and optimizing the process, the automobile electronic parts production line will be upgraded and expanded. After completion, the new energy automobile parts production capacity will be increased by 400,000 sets/year, which will drive about 13,000 jobs. The national-level new energy vehicle testing center and vehicle-level semiconductor device and system R&D industrial base project aims to provide testing and verification opportunities for domestic independent semiconductors, and promote the industrialization verification and scale commercialization of domestic semiconductors. After completion, it is estimated that the average output value per mu will reach 31.25 million yuan.

BYD New Energy Passenger Car Parts Phase II Project

BYD New Energy Passenger Car Parts Phase II Project

  In the field of 5G industry, the West High-tech and Defense Phase II with a total investment of 3.3 billion yuan — The 5G Communication Industrial Park Project (South Zone) will devote itself to the research and development, production and manufacturing of 5G communication electronic products, and build facilities such as data room, production plant and assembly plant of R&D headquarters to help enterprises further seize the market share of 5G communication; The construction project of Xi ‘an Science and Technology Industrial Park Phase III, 5G Digital Factory and Science and Technology R&D Building, with a total investment of 1.87 billion yuan, mainly focuses on the research and development, production and sales of power electronic equipment such as inverters, flexible DC, SVG equipment and energy storage. After completion, it is estimated that the average output value per mu will be 26.79 million yuan.

West High-tech Days and Defense Phase II — 5G Communication Industrial Park Project (South Zone)

West High-tech Days and Defense Phase II — 5G Communication Industrial Park Project (South Zone)

  In the field of intelligent manufacturing, the project of Jixian Electronic Intelligent Manufacturing Industrial Park, which started in Xi ‘an High-tech Zone, has a total investment of 1.6 billion yuan, mainly building comprehensive office centers, multifunctional intelligent production workshops, intelligent logistics storage centers and other facilities, and will attract upstream and downstream high-tech enterprises including electronic equipment manufacturing, automobile integrated service industry, intelligent equipment industry and electronic information industry to settle in. After the project is completed, it is estimated that the average output value per mu will be 12.28 million yuan, which will drive about 5,000 jobs.

  In addition, the newly-started business supporting projects such as Ziwei Yunduhui and Gaoxin Tianjing R&D Office Business Complex will further improve the regional business supporting facilities, enhance the regional competitiveness and optimize the "high quality and high technology" energy level.

Said I sent me a lawyer’s letter overdue

With the popularity of financial services and the rise of Internet lending, many people are exposed to loans, credit cards and other related products. However, it is not uncommon to ask late questions, which is followed by severe collection measures, including lawyers’ letters. Today, we discuss the topic of "saying that I sent a lawyer’s letter to me overdue", and analyze the root causes, legal consequences, solutions and the importance of personal credit management.

Said I sent me a lawyer's letter overdue

Many people rely more and more on loans and credit cards for consumption and financial management, but the overdue questions are also on the rise. Once I accidentally defaulted on a credit card bill and received a serious lawyer’s letter. This letter not only puzzled me, but also made me realize the seriousness of the question-saying that I sent me a lawyer’s letter overdue. What went wrong?

The causes of overdue questions include poor personal financial management. Many people lack planning, fail to budget their expenditure and income reasonably, which leads to their inability to repay on time. Unexpected events may also lead to overdue, such as sudden decrease in income or increase in family economic pressure, but financial institutions will not cut their requirements for individual reasons, and those who are overdue will be recovered.

The fact that I sent me a lawyer’s letter overdue reflects a bigger question, which is the bank or the loan platform, and the attitude towards overdue behavior is getting tougher and tougher. This situation not only affects personal credit, but also may become a hidden danger in economic life.

Said I sent me a lawyer's letter overdue

Behind "saying that I sent me a lawyer’s letter overdue" is the serious attitude of the law. In our country’s law, financial contracts are legally binding. If individuals sign repayment agreements with banks or other institutions, they will be responsible for their own credit behavior. Once the overdue situation occurs and the repayment obligation is not fulfilled on time, the financial institution can take recovery measures in accordance with the terms of the contract and relevant laws.

A lawyer’s letter is a formal legal document, which is usually sent by a law firm. Its purpose is to urge the debtor to repay as soon as possible. The fact that I sent a lawyer’s letter to me overdue shows that I have entered the stage of legal intervention. A lawyer’s letter usually lists the amount owed, the breach of contract and the legal consequences, and may misappropriate the penalty clause in the contract to increase the debt.

If the overdue person fails to solve the question after receiving the lawyer’s letter, the consequences may become more serious, including case litigation, property freezing, credit record damage and so on. Saying that I sent a lawyer’s letter overdue is not only a paper threat, but an actual legal pressure, which should not be underestimated.

Said I sent me a lawyer's letter overdue

When faced with the situation of "saying that I sent me a lawyer’s letter overdue", it is particularly important to deal with it correctly, and never choose to escape. In this case, active communication and solution are the key to avoid legal consequences.

The first step is to calm down and carefully examine the contents of the lawyer’s letter to confirm whether the amount owed is correct. If there is any mistake, you should contact the other party in time to solve the problem; If it is correct, a repayment plan should be made as soon as possible. Many financial institutions allow repayment by installment or negotiation, so as to avoid further legal proceedings.

Explaining your financial situation is also an effective strategy. Saying that I sent me a lawyer’s letter overdue actually reflected the pressure of collection. If you can provide proof to financial institutions or law firms, such as reduced income and family emergency expenses, you may win a certain degree of tolerance.

Said I sent me a lawyer's letter overdue

In any case, don’t ignore the lawyer’s letter as a legal document. Delay in handling will not only lead to more complicated legal disputes, but also seriously damage personal credit. It should be warned that I sent a lawyer’s letter to me after the deadline, so that I can learn to deal with and guard against it.

After dealing with overdue questions, it is more important to avoid similar situations from happening again. Saying that I sent me a lawyer’s letter overdue made me deeply aware of the importance of personal credit management.

We should develop good financial planning habits. Make a budget every month, define the ratio of income to expenditure, and ensure that the repayments are covered by sufficient funds. If you can’t avoid loans, you must choose an appropriate amount and do what you can.

Said I sent me a lawyer's letter overdue

Pay attention to the change of credit history. After saying that I sent me a lawyer’s letter overdue, I went to inquire about my personal credit report and found that the historical overdue had been recorded. Credit records directly affect the ability to apply for loans and other financial services, so we should always pay attention to them.

Keeping communication channels open is also an important means. The experience of saying that I sent a lawyer’s letter to me overdue made me understand that when the economic pressure is great, I should communicate with financial institutions as soon as possible, and strive to solve the problem as soon as possible to avoid worsening the problem.

Saying that I sent me a lawyer’s letter overdue taught me a profound lesson. This is not only a simple reminder, but also a warning in many aspects such as law, credit and financial management. By analyzing the root causes, legal consequences, coping strategies and personal credit management, we can more deeply understand the importance of financial contracts and how to abide by commitments in economic behavior.

Everyone may encounter times of economic stress, but the key is how to face and solve the problem. Learning from the experience of "saying that I sent me a lawyer’s letter overdue", we can better manage our finances in the future, avoid falling into similar difficulties, and at the same time safeguard our personal credit and move towards a more stable economic life.

Peripheral Blood Cell Morphology and Interstitial Assessment —— Erythrocytes

Original Hou Bingbing Jing Wong Inspection Medical Network

Author: Hou Bingbing Jing Wong

SETTING: Shijiazhuang Traditional Chinese Medicine Hospital, Hebei Province

After the peripheral blood smear was stained with Wright’s stain, the normal red blood cells were pale pink (the center of the cell was a lightly stained area with a diameter of 1/3), and the size was uniform (6.7-7.7um). There were no other abnormal structures in the cells, and red blood cells were scattered at the junction of the body and tail of the blood smear. Various reasons may lead to changes in the morphology and structure of red blood cells, such as abnormalities in the size, shape, dyeing, structure and arrangement of red blood cells (note: human factors, such as production and dyeing, should be excluded first). The pictures in this article are mainly taken from Shanghai Clinical Laboratory Quality Control Center in previous years.

Macroerythrocytes

Macrocyte (diameter > 15um), macrocyte (diameter 10-15um). Erythrocyte volume changes are mostly seen in megaloblastic anemia caused by folic acid or vitamin deficiency, and also in hemolytic anemia or MDS and other diseases.

Target red blood cell

Red blood cells are larger in diameter, deeply stained in the center, lightly stained around and deeply stained at the edge of cells, such as shooting targets. It is more common in thalassemia. Such as timely drying and fixing when smearing can also cause similar changes.

Spiny red blood cell

The length, width and spacing of protrusions on the surface of red blood cells are different (pay attention to distinguish them from blunt sawtooth red blood cells). It is more common in β -lipoprotein deficiency (acanthocyte can reach 80%), and can be seen after splenectomy, alcoholic liver disease, uremia and so on.

Blunt sawtooth red blood cell

That is, shrunk red blood cells, the length, width and spacing of cell surface protrusions are the same (pay attention to distinguish them from blunt sawtooth red blood cells). More common in hypertonic environment or improper production.

cabot ring

Purple-red thin coil structure appearing in red blood cells, sometimes wound in a figure of eight. Its nature is not clear at present, and it is thought that it may be the residue of nuclear membrane or spindle or the product of lipoprotein denaturation in cytoplasm. Common in patients with megaloblastic anemia, hemolytic anemia, leukemia or lead poisoning.

Mouth red blood cell

The pale area in the center of red blood cells is a narrow crack, the center of the crack is narrower than both ends, and the edge of the crack is clear, similar to a slightly open fish mouth. A small amount of oral red blood cells can also be seen in normal people’s peripheral blood, which is generally 3%-4%. If it exceeds 4%, it can be considered abnormal. When it increases, it is more common in hereditary oral polycythemia, which can be seen in DIC, alcoholism, hemolytic anemia and liver disease.

Helmet red blood cell

The shape is irregular, with 2 to 3 sharp corners in helmet shape, which is more common in disseminated intravascular coagulation, microangiopathic hemolytic anemia, cancer metastasis and so on.

Teardrop red blood cell

Red blood cells are teardrop-shaped, pear-shaped, cudgel-shaped, etc., which are most common in myelofibrosis and hemolytic anemia.

schizocyte

The cells are irregular in shape, different in size, and have asymmetric pointed protrusions, which are red blood cell fragments or incomplete red blood cells. Usually irregular triangle, thorn or helmet shape. A small amount of erythrocytes can also be seen in normal people’s peripheral blood, which is generally less than 2%. If it exceeds 2%, it can be considered abnormal. It is a fragment of red blood cells caused by mechanical injury or endogenous abnormality, which is mainly found in DIC, microangiopathic hemolytic anemia, megaloblastic anemia, severe burn and so on.

Money-shaped red blood cells

The arrangement of red blood cells, like copper coins strung together, indicates that the blood viscosity is high, and abnormal proteins appear in plasma, which reduces the negative charge of red blood cells, changes the plasma charge balance, and reduces the repulsive force between red blood cells, thus facilitating the formation of money-like aggregation and accelerating the erythrocyte sedimentation rate. More common in multiple myeloma, hyperglobulinemia, hyperfibrinemia and so on.

spherocyte

The lightly stained area in the center of red blood cells disappeared, and the whole cells were deeply and evenly colored. Under normal circumstances, a small amount of spherical red blood cells can also be seen in peripheral blood, generally less than 3%. The increase in the proportion of spherical red blood cells is more common in hereditary spherocytosis (often more than 25%, sometimes reaching 100%), autoimmune hemolytic anemia, abnormal hemoglobinopathy, liver cirrhosis, hypersplenism, chronic infectious diseases, globin body hemolysis, neonatal hemolysis and hemolytic diseases caused by erythrocyte enzyme deficiency.

Polychromatic erythrocytes

The whole red blood cell or a part of its cytoplasm is grayish blue (due to the coexistence of intracellular RNA and hemoglobin), which is called polychromatic red blood cell. Under normal circumstances, a small amount of polychromatic erythrocytes can also be seen in peripheral blood, which is generally less than 1.5%. The increase of polychromatic erythrocyte ratio is more common in hemolytic anemia or acute hemorrhagic anemia, which indicates that bone marrow proliferative ability is active.

Basophilic stippling erythrocytes

Small blue particles with different sizes and scattered distribution can be seen in red blood cells, which is a relatively naive red blood cell. It may be due to the degeneration, aggregation and precipitation of basophils remaining in the cytoplasm after heavy metal damage to cells and the formation of particles. Under normal circumstances, basophilic spotted red blood cells (about 1/10000) are rarely seen in peripheral blood, but they are more common in heavy metal poisoning (such as lead, mercury, bismuth, etc.).

Howell-Jolly corpuscles

Red blood cells contain 1-2um purplish red round corpuscles with different sizes and numbers. This corpuscle may be the nuclear chromatin remaining during the division of young red blood cells. Common in hemolytic anemia, megaloblastic anemia, splenectomy, erythroleukemia or other proliferative anemia.

Oval red blood cell

Red blood cells are oval or rod-shaped, with a length of 3-4 times greater than the width, a maximum diameter of 12.5μm and a transverse diameter of 2.5 μ m.. This kind of red blood cell is placed in hypertonic, isotonic and hypotonic solution or normal human serum, and its oval shape remains unchanged, but neither young red blood cell nor reticulocyte is oval. Under normal circumstances, oval red blood cells are rarely seen in peripheral blood (about 1%, not more than 15%). In the blood smear of patients with hereditary ovalocytosis, the proportion of such red blood cells can reach 25% or even as high as 75%, and the proportion of oval red blood cells can also increase in thalassemia, megaloblastic anemia, myelosclerosis and iron deficiency anemia.

Nucleated red blood cell

Under normal circumstances, nucleated red blood cells can not be seen in adult peripheral blood, but a small number of nucleated red blood cells can be seen in neonatal peripheral blood within one week of birth. When nucleated red blood cells appear in adult peripheral blood, they can be seen in various proliferative anemia (hemolytic anemia, acute hemorrhagic anemia, megaloblastic anemia and severe hypopigmentation anemia can also appear), malignant tumor or metastasis of hematopoietic system, splenectomy and severe hypoxia.

Crescent red blood cell

Red blood cells are pale, incomplete and crescent-shaped (note that they are differentiated from sickle-shaped red blood cells). Mainly seen in some hemolytic anemia (such as PNH).

Red blood cells are infected with plasmodium (ring)

The nucleus of plasmodium ring is located on one side of the worm, which is shaped like a ring inlaid with precious stones. It is found in the peripheral blood of patients infected by plasmodium.

[References]

1. Wu Xiaoman. Basis of Clinical Laboratory [M]. 1st Edition. Wuhan: Huazhong University of Science and Technology Press, 2013.

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Lecture | Du Weisheng, Research Librarian of the National Library: The Binding of Ancient Books in China

Mr. Du Weisheng is a research librarian of the National Library of China, a representative inheritor of national intangible heritage projects, and has been engaged in the restoration of ancient books in the National Library of China for more than 40 years. He is familiar with all kinds of binding forms of ancient books in China, not only mastering the repair techniques of various binding forms of ancient books in China and the mounting techniques of traditional calligraphy and painting in China, but also dealing with all kinds of difficult problems in the process of repairing ancient books. At the same time, he is familiar with the binding and repair techniques of modern hardcover books and paperback books, and also familiar with the binding and repair techniques of ancient hardcover books in Europe. The ancient books he repaired include hundreds of Dunhuang suicide notes from the Southern and Northern Dynasties to the end of the Tang Dynasty, and thousands of rare ancient books such as Wenyuan Yinghua in the Song Dynasty, Yongle Dadian in the Ming Dynasty.

Recently, Du Weisheng was a guest at the 13th lecture of "History of Calligraphy and History of Books" in Peking University Institute of Literature and Art, with the theme of "Paper and Ancient Books in China", which brought us a new understanding of the whole civilization progress system in China with paper as the carrier from the perspective of materials and technological process. The Paper (www.thepaper.cn) arranged some lectures for readers.

Book carrier before the invention of paper

Du Weisheng starts with the book carrier before the invention of paper. At this stage, people mainly write on bamboo slips, wooden slips and silk books, and bamboo and silk books are the earliest known formal books in ancient China. Simplified books appeared in Shang and Zhou Dynasties. In the article Shangshu Doshi, the Duke of Zhou warned the adherents of Yin in the early years of the Western Zhou Dynasty: "Only you know, only your ancestors, there are books and codes." A "book" is a book made up of letters. Both Oracle Bone Inscriptions and Jin Wen have the word "book", which shows that there were already books compiled into volumes at that time.

There are two types of compilation of simplified books: first compilation and then writing, and first writing and then editing. Most of the simplified books compiled first and then written are official documents handed down by Confucian classics or classics. Books written first and then compiled are more common in bookkeeping documents. The differences in the use of bamboo slips and wooden slips are generally written on bamboo slips when there are many words, and on board slips if there are fewer words. In the Book of Rites, it is said: "More than 100 books are written in the strategy, not as good as 100 books." The so-called "strategy" and "square", as Zheng Xuan said in the Eastern Han Dynasty, "strategy is simple; Party, board also ". What we are talking about is the usage of bamboo slips and board slips, where more than 100 words are written on bamboo slips and less than 100 words are written on board slips. Now, the words "celebrity’s handwriting" and "letters" are all derived from this.

Silk book with column lines, from Hunan Provincial Museum.

Silk books appeared after bamboo and wooden slips, and some silk books were marked with column lines. The two thick lines on the upper and lower sides actually symbolized the string that connected bamboo slips. The thin ones below actually symbolize the gaps between bamboo slips. Now it’s called hangge. In fact, these lines are the legacy of bamboo slips.

The binding forms of Jane Eyre and Silk Book are: first, all the leaves of the book are connected into a long strip, and the thicker paper is directly rolled up like Jane Eyre, while the thinner paper is imitated by silk book with a small stick of important official, and then rolled up, which is called "rolling".

Bamboo tubes and lacquered wooden cases: Silk books can be rolled up with scrolls or folded and put in fittings. Common containers include bamboo barns (small boxes woven from bamboo strips) and lacquer wood boxes.

Taking Mawangdui silk as an example, Du Weisheng mentioned that many people attach importance to the writing of silk, but its binding form is actually more valuable. It was arranged leaf by leaf and put in a box. In fact, this form is no longer a package, which is the beginning of the leaf system of ancient books in China. Except that the leaves are not bound together, this book already has all the elements of a leaf book.

The invention of paper and the development of binding mode

"Paper is a flat and uniform sheet-like fiber product, and it is the carrier of writing and printing. ….. "When talking about the definition of modern paper, Du Weisheng pointed out that" plant fiber "had to be added to the definition in the early years, but with the spread of chemical fiber paper in the market, the definition of paper also changed. Therefore, paper is a material closely related to the times.

The invention of paper, traditionally speaking, Cai Lun in the Eastern Han Dynasty summarized the previous paper-making technology and improved it, and in the first year of Yuanxing (105) played its improved method. Emperor Jiashan’s ability, Cai Lun’s paper-making method was promoted. From the perspective of technical history, the invention of bamboo paper, that is, bamboo fiber (stalk) papermaking technology, is a milestone event in China’s papermaking history, which provides technical preparation for future generations to make paper from wood.

Cai Lun paper

As for the time when bamboo paper appeared, according to the existing materials, Du Wei pointed out that bamboo paper had not been seen in the Tang Dynasty. Yi Xiaohui, a librarian of the National Library, added that according to the literature, some people think that bamboo paper originated in Sui and Tang Dynasties. But why we can’t see the real thing of bamboo paper in modern times is actually related to the characteristics of bamboo paper raw materials, which have high lignin content and are not resistant to aging.

And why can bamboo paper, which is not very aging-resistant, be preserved after the Song Dynasty? Because there was an innovation in paper technology during this period. Before the Song Dynasty, bamboo was important for life, but it had not yet entered the cultural field. In the Song Dynasty, bamboo paper just caught up with the advent of printing, which required a lot of paper, and traditional leather paper could not meet this demand. The two technologies promote each other and promote the innovative technology of mass production and preservation of bamboo paper.

In addition, the quality, thickness and excellent production of paper directly affect the binding form and service life of books. Before the Song Dynasty, books were mostly written by hand, and the paper was generally thick, mostly between 0.8 and 0.13 mm. At this time, books were mostly rolled. In the Song Dynasty, printing flourished and book production reached an unprecedented peak. At this time, in order to reduce the production cost of books, the book paper is much thinner than that in the Tang Dynasty, generally 0.06-0.08 mm, and the thinnest paper has reached about 0.05 mm.

Because the leaves of the book are thin, if the book is still in the form of roll, it will be difficult to roll it up. In this way, the binding form of books has also changed, from roll to leaf butterfly. Later, in order to adapt to thinner book paper and speed up the binding of books, Bao Beizhuang, thread binding and other binding forms have gradually developed.

The connection between binding forms 

The binding forms of ancient books in China mainly include simple strategy, scroll binding, folding binding, Van Gogh binding, butterfly binding, Bao Beizhuang binding, thread binding and so on. With the change of book-making materials and the development of book-making technology, book binding forms are constantly evolving, which is more conducive to people’s reading and book preservation and protection. When talking about silk fittings, Du Weisheng mentioned that every binding form of China’s books is related.

After the appearance of paper books, it inherited the binding form of simple strategies and silk books, which is called "rolling". Rolling is a common binding form in ancient books in China. At the end of the Song Dynasty, in order to protect books and increase their appreciation, there appeared a mounting form in which the four sides of rolled books were inlaid with silk fabrics such as twill and silk, stretched and calendered, and then added with heaven and earth poles. Mounted pieces that are horizontally displayed become "hand scrolls", and those that are vertically hung for appreciation are called "vertical shafts" or "hanging shafts". Until today, the binding of calligraphy and painting works in China generally still uses this form.

Scroll-mounted Tang Dynasty manuscript

Bookleaf book is the last stage of the development of book binding in ancient China, and it is also the best representative binding art among ancient books in China. The main feature of album books is that many single pages are assembled and bound into a book, which is also a completely different book form from the simple silk and scroll books that are spread and read. It is a revolution in the history of book binding in China.

Books with leaves mainly include Van Gogh’s clip-on, warp-folding, whirlwind or Long Lin’s, sewing, stitching and many other forms. This form of Sanskrit sandwich was first seen in the ancient Indian Buddhist classics written on Bedolo leaves in Sanskrit, and was mainly popular in the Central Plains of Sui and Tang Dynasties after it was introduced to China. The Van Gogh folder folds the scallops with written words in sequence, clamps them with a board from top to bottom, and pierces holes and ropes. In addition, the Van Gogh clip is not written, but engraved, engraved with a pen with a needle. After engraving, it is smeared with red oil or black oil and infiltrated from the place where the pen tip is cut, which becomes a scarlet letter or black word.

Bei Ye Jing in Dai Language (Fan Jia Zhuang)

The warp folding is developed under the influence of Van Gogh’s clip-on. The method is to stick the written and printed leaves together into a long strip, then fold them evenly according to the fixed specifications, and then stick a thick paper on the first and second leaves as the book cover. Because Buddhist and Taoist classics mostly adopt this binding form, it is called "folding". Folding is also a common binding form in ancient books in China, which can often be seen in ancient costume TV series.

Warp folding

In the late Tang Dynasty and the Five Dynasties, there was also a popular binding form between scroll binding and leaf binding-"whirlwind binding". According to the literature records and the physical objects in the existing Dunhuang suicide note, the adhered leaves are repeatedly folded from the end of the book to the front of the book according to certain specifications, and the front of the book is slightly longer as the backing paper, and the left folding mouth is gathered and fixed, clamped with a stick, punched and threaded; Or a single book leaf written on both sides is collected in sequence, put on a piece of base paper, and the left side is directly bound with thread; The leaves of the book are arranged in an orderly way during exhibition and reading, and rolled up with the collected side as the axis during collection. Whirlwind has basically possessed some characteristics of book-leaf system. Books can be "leafed through" when they are being read, and they are "making a whirlwind leaf paper" when they are rolled up. It can be said that "whirlwind" is an improvement of rolled books.

Long Lin Zhuang

In the Tang Dynasty, "stitching and binding" was also popular for a short time. The appearance of "stitching and binding" is close to that of hardcover books now, and the biggest difference is the bare spine. When talking about the binding technology of "stitching" books, which pioneered modern hardcover books, Du Weisheng put forward a questioning conjecture against the statement that "hardcover books came from the west": in fact, western hardcover books were stitched from China, spread to Central Asia and then spread to Europe. The basis is that the binding mode of western books is from volume to hardcover, with a vacuum in the middle, while the binding mode of ancient books in China is consistent with each other.

Cover of "Eight Yang God Curse Sutra" (stitched and decorated)

The closest thing to the appearance of modern paperback books is "Bao Beizhuang", and the most typical book by Bao Beizhuang is "Si Ku Quan Shu". Bao Beizhuang’s way of folding leaves is the opposite of butterfly dress. Fold the page without words and the page with words outward, and then bind it. The appearance of paperback books is exactly the same as that of today’s paperback books. The difference between paperback books and ancient books on the back is that paperback books are printed on two sides of a book, while Bao Beizhuang ancient books are folded on two sides of a book. There is only one difference.

Sikuquanshu

The origin of thread packing is very early, which existed in the Tang and Five Dynasties. Du Weisheng mentioned that he saw the thread packing in the Dunhuang suicide note in France, and the method of setting the line was basically the same as today’s thread packing. At present, thread-bound books generally have four eyeliners, while the thread-bound book in Dunhuang suicide note has three eyeliners, so one eye is punched up and down, one eye is punched in the middle, and it is sewn with a single thread. Except for the number of thread-bound eyes, the others are exactly the same as the common thread-bound books.

After the middle of the Ming Dynasty, in order to adapt to the frequent reading of books, thread binding became popular. Thread-bound is the same as the folding way of bag back. The spine of the book is exposed, nailed and threaded, and bound into a book. Thread-bound is the most common binding form of ancient books in China after the middle of Ming Dynasty. The significance of the appearance of thread-bound books to ancient books in China is: firstly, it simplifies the binding process, but improves the labor efficiency; Third, it provides technical conditions for large-scale production of books.

Is it reliable to change places by working?

  The courtyard of Nuoda is full of greenery. A homestay on Huandao Road in Xiamen is welcomed by travelers in the form of "working for accommodation". Many young people come here to help the homestay do some service work in exchange for accommodation, get in touch with the society in a way of life and get to know the city from the perspective of life.

  "Work for lodging" is also called "volunteer travel". This kind of tourism is very popular in Japan, Australia, New Zealand, the United States, Canada and other countries and regions, especially among young people. They exchange their labor and professional skills for free accommodation or money. The main purpose is to truly integrate into local life through their experience in local work and in-depth tourism.

  In recent years, many places in China have also begun to rise. Many young people, especially college students, take advantage of their holidays and choose to go out to work and vacation, thus gaining different life experiences while working and vacationing.

  Different life experiences

  "I spent very little money and went to many places, and it was not a cursory visit." Xiaoshi is a student in Fujian Normal University. From the first year of his freshman year, he tried to "work for accommodation". In this way, he stayed in Beijing for more than a month and traveled all over the scenic spots, leaving his footprints in Lijiang and Sanya.

  Xiaoshi told reporters that this kind of travel is very suitable for young people, and many people around him have tried it. "Mainly to help do some simple work, such as cleaning, picking up and dropping off, etc. Basically implement a shift system, take a day off from work, and you can arrange your own time to play. "

  According to professionals, the job opportunities provided by homestays can be roughly divided into two categories: "general accommodation change" and "professional accommodation change". The former refers to manual work such as cleaning and weeding, while the latter includes cooking, translation, decoration, tour guide and field investigation. If you have expertise in hotels and restaurants, or are experienced in tourism, you are more likely to be selected, and you can be responsible for cooking, garden layout, shooting and so on.

  Chen Binggang has just worked, but she is a senior "work-for-accommodation" traveler. She visited more than ten countries in South Asia, the Middle East and Africa at a very low cost and experienced the customs of each country.

  Xiamen Mark Inn has been carrying out "work-to-stay exchange" for seven years, and the exchange period is 30 days each time. The inn has formulated a system to protect the rights and obligations of participants. College students come here, mainly to do some room cleaning, front desk management, help guests pour tea, pick up guests and so on.

  "After deciding where you want to go, you can start looking for job opportunities in a specific area." Chen Bing said that at present, there are a lot of experiences to share on the Internet, and employers will send out recruitment notices on their own initiative. If you want to "change jobs and stay" smoothly, you must do your homework beforehand.

  The reporter learned that at present, many famous tourist attractions in China, such as Phoenix in Hunan and Jiuzhaigou in Sichuan, have the same form of tourism.

  Attracting young labor force to help tourism

  "Through work, I got not only free accommodation, but also an interesting experience, which is very helpful for my growth." Xiao Shi said that through the travel mode of "working and staying", not only can you travel deeply and truly understand the customs of a place, but you can also meet all kinds of people and cultivate your independence and ability to deal with others through work and exercise.

  "Especially my original spoken English was poor, but I met many foreigners in Beijing for a month. Through face-to-face communication with them, I have made rapid growth in this respect." Xiao Shi said that the main reasons why young people are keen on "changing jobs and lodging" now include broadening their horizons, improving their language ability and cultivating their independence, and satisfying their curiosity about the world.

  Mark, the person in charge of Xiamen Mark Inn, believes that "working for accommodation" is favored because it allows travelers to understand the customs of a place in a new way. "Living in a different way, it is not a pure trip, but a way to travel by life. Of course, this kind of travel is a win-win situation for both hotel operators and travelers. "

  For homestay operators and tourism agencies, the trendy way of "working for accommodation" can attract young workers to alleviate the short-term shortage of labor and help the development of local tourism.

  Enhance the awareness of prevention

  With the rise of "working for accommodation", people in the industry reminded that there are also many unscrupulous workers, and there is a lack of protection when problems arise. Young people should keep their eyes open and avoid risks, such as carefully identifying the authenticity of the recruitment information of "work for accommodation", choosing a guaranteed travel platform of "work for accommodation", buying insurance and signing relevant agreements.

  Chen Bing said that in the process of "changing jobs for lodging", we should strengthen our awareness of self-protection and pay attention to personal safety and property safety. Especially when going abroad to "work and change places", it is necessary to understand the relevant regulations of the place where you go, including the nature of your documents and the restrictions on your work. In addition, we should also pay attention to the protection of personal rights and interests, and safeguard rights when necessary.

  Gan Mantang, a professor at the School of Humanities and Social Sciences of Fuzhou University, also said that "changing jobs and lodging" should do all kinds of homework before departure and pay attention to preventing risks. The first is the legal risk of working. Before you travel, you should know whether your country and region allow short-term jobs with travel documents. If it is not allowed, or there is no regulation, it is necessary to guard against the legal risks of illegal work. The second is the work content and welfare. In terms of work, you need to know the contents of work services provided by your hotel or work organization, including working hours, working hours, working content, etc. In terms of welfare, whether to provide three meals, transportation, transportation subsidy, accommodation place, pocket money, extra course experience, etc.

  Gan Mantang believes that "working for accommodation" is a new thing, and it is necessary to strengthen the supervision of the information on the platform of "working for accommodation" on the Internet to prevent false information from misleading college students. At the same time, it is necessary to carry out supervision and irregular inspection on the recipients of "work for accommodation" to ensure the healthy development of this new mode of travel.

Huawei Pura70 still uses short-focus fingerprint recognition? The reason may be here.

   [Tianji. com Mobile Channel]As Huawei Pura70 series started the pioneer program yesterday, many people experienced this product at the first time. Xiaobian was satisfied with this one as a whole after the experience, except for the unlocking experience.  

Huawei Pura 70 still uses short-focus fingerprint recognition? The reason may be here.

    Huawei was one of the earliest manufacturers to adopt screen and 3D structured light face recognition, even in the past Huawei Mate20  Pro  UD、Mate30  Pro、Mate40  Pro is equipped with two payment-grade biological unlocking schemes, namely, screen fingerprint recognition and 3D structured light recognition, and the screen fingerprints of the above-mentioned models are still ultra-thin recognition modules, and the recognition position is very reasonable. At that time, the unlocking experience of Huawei’s flagship mobile phone can be said to be the most perfect in the whole machine circle.  

Huawei Pura 70 still uses short-focus fingerprint recognition? The reason may be here.

    However, from the beginning of Huawei’s flagship mobile phone, the short-focus screen fingerprint recognition module has become standard, which has little impact on Mate series supporting 3D structured light face recognition. However, for P series, short-focus fingerprint identification, which is extremely low, has become the only payment-level biometric identification scheme, and it is not comfortable to use. In the latest Pura70 series, all models from 5000 to 10000 are using short-focus fingerprint recognition. Xiao Bian thinks this shortcoming is the biggest regret of Huawei Pura70.  

Huawei Pura 70 still uses short-focus fingerprint recognition? The reason may be here.Huawei Pura 70 still uses short-focus fingerprint recognition? The reason may be here.

   The good news is.This situation should be improved in the near future. At present, there are two kinds of fingerprint identification technologies under the screen: optical fingerprint identification and ultrasonic fingerprint identification. The unlocking principle of optical fingerprint recognition is to use the refraction and reflection of light. When a finger is placed in the unlocking area, high light will appear in the area to illuminate the fingerprint area, and the reflected light will return to the sensor under the optical fingerprint module through the gap of the screen.

    The principle of ultrasonic fingerprint identification technology is that the finger presses the screen, and the sensor under the screen emits ultrasonic waves to the finger pressing area. When the ultrasonic wave touches the "gully" of the fingerprint, the degree of absorption, penetration and reflection is different, and echoes with different energies will be generated and received by the sensor, so as to construct a 3D fingerprint image, and then achieve the purpose of identification and unlocking.  

Huawei Pura 70 still uses short-focus fingerprint recognition? The reason may be here.

    Compared with the two technologies, ultrasonic fingerprint identification technology has the characteristics of fast identification speed, high identification rate, strong penetration, no fear of water stains and stains, strong interference ability, support for in-vivo detection, high security and so on, and it is the main identification scheme used by many flagship models at present.

    However, the existing ultrasonic fingerprint identification scheme is mainly provided by Qualcomm, and Huawei’s Kirin platform does not have relevant patents, so we can’t use more advanced fingerprint identification scheme on the latest Mate and Pura models.  

Huawei Pura 70 still uses short-focus fingerprint recognition? The reason may be here.

    Recently, the network exposed a new patent of Huawei called "an ultrasonic fingerprint identification module, system and electronic equipment". As the name implies, this is Huawei’s self-developed ultrasonic fingerprint identification scheme. In addition, according to well-known digital bloggers, there is a Mate  70 is testing the ultrasonic fingerprint sensor, and it seems that it will not be particularly far away from the practical application. There is great hope for P80 and Mate80 next year.  

Huawei Pura 70 still uses short-focus fingerprint recognition? The reason may be here.

    This style of acting is very "Huawei", including the previous screen. Before, Huawei flagship machine’s screen had a big gap in quality and perception compared with competing products. The reason was that Huawei insisted on using and supporting domestic screens. Although it was controversial, after years of efforts, domestic screens finally made great progress. Now many mobile phones will be proud of being equipped with domestic screens, and the overall price of OLED screens for mobile phones has also become lower. Many domestic enterprises related to display have also gained sufficient technical accumulation.  

Huawei Pura 70 still uses short-focus fingerprint recognition? The reason may be here.

    In the research and development of fingerprint identification scheme, Huawei still follows its own rhythm. When it is in trouble, it does not choose to compromise, concentrates on research and development, and then makes a blockbuster. I believe that in the future, we can use the self-developed ultrasonic fingerprint identification technology.

During the global anti-epidemic campaign, President Sese met with China’s anti-epidemic expert group Vucic: Thank you very much, Dr. China.

       Cctv newsOn the 1st, Serbian President Vucic and China’s Ambassador to Serbia Chen Bo met with China’s anti-epidemic expert group to express their gratitude to Dr. China, who has helped Serbia fight the COVID-19 epidemic for more than 40 days, and bid farewell to the three China doctors who are about to leave for home and the Chinese team of the "Fire Eye" laboratory.

       According to the data released by the Serbian Ministry of Health on the 1st, there are 9,205 confirmed cases and 185 deaths in Serbia, and 1,397 people have been cured.

       Vucic said that the detection rate of confirmed cases in Serbia has dropped to about 3%, which is of great symbolic significance in the fight against the epidemic, indicating that the epidemic situation in Serbia has been basically controlled. The arrival of the China expert group further tempered the "hardcore" friendship between the two peoples and set up another solid bridge of friendship between Serbia and China.

       China’s anti-epidemic expert group and its six members arrived in Belgrade on March 21st. At the request of the Serbian government, their return home has been postponed several times. After three members of this expert group return to China, domestic experts in the fields of nursing, infection control, respiratory and critical illness will be sent to Serbia.

       Also attending the meeting with the anti-epidemic expert group was the Chinese working group of the "Fire Eye" laboratory. On April 20th, Serbia’s first "Fire Eye" virus detection laboratory, which was designed and donated by China enterprises, was completed in Belgrade. The completion of this laboratory can greatly improve Serbia’s Covid-19 detection capability. Up to now, the Chinese working group has completed the training of 40 Serbian volunteers.

Chloe Zhao’s first show on the big screen, "The Strange Event of School Flowers", attracted attention.


Chloe Zhao’s big-screen masterpiece "The Strange Event of Campus Beauty"

    China’s first campus horror film to be released on July 12th truly reproduces the highlights of human soul out-of-body experience, people and ghosts in different ways, and yin and yang.

Yihuan turned to the big screen and turned into a screaming school girl.

    Susu, the No.1 female school flower in The Weird Event of School Flowers, is played by Chloe Zhao. With the series of micro-movies, such as "Harmony", Chloe Zhao has created 2 billion online hits, becoming a well-deserved diva in the minds of the post-80s and 90s. As her first show on the big screen, The Strange Event of the Campus Beauty changed the image of rebellious campus beauty in the past, turned into a screaming campus beauty, and staged a horror version of Adolescence.

    In line with the image in Chloe Zhao’s film, the film has also launched an activity of looking for "screaming school beauty" in an ingenious way. At present, hundreds of screaming videos have been received, which has become a good medicine for summer students to decompress.


Chloe Zhao and Wang Yi starred in "The Strange Event of School Flowers"


Chloe Zhao starred in "The Strange Event of School Flowers"
 

"Adolescence" couples file and then work together to interpret the China version of "Ghost""

    Mainland horror films have always been rated as "brain-dead" and "shoddy". After being "hurt" again and again, horror film fans have to turn on their computers and watch foreign horror films while criticizing domestic horror films for "disappointing". The domestic horror film market also has various disadvantages, such as relatively low production cost and various censorship restrictions, which leads to a large number of shoddy and random works flooding the cinema.

    David Kuan, the director of the seventh generation of cutting-edge dark horse, is deeply aware of this point. At the beginning of the project of "The Strange Event of Campus Beauty", David Kuan was determined to make a different domestic horror film to make up for the "injury" suffered by the audience when watching previous horror films. Countless times to reinvent the wheel, patiently polishing the script for four years, and paying a lot of money to invite the "adolescent" couple file with super popularity on the Internet — — Chloe Zhao and Wang Yi co-starred, spending huge sums of money to build a ghost castle in the national 5A-level scenic spot according to the ratio of 1:1, and invited a professional visual effects team from Hollywood to join us. They took great pains in making pictures and sound effects, and accurately set 52 horror spots. In the second half of the film, they also vividly created the China version of the classic romantic film "Ghost". The beautiful campus pure love story is close to the ground, close to the audience’s heartstrings, and accurately pokes the audience’s lacrimal glands.

    On July 12, I look forward to "The Strange Event of School Flowers" to set off a summer campus horror wind and watch the screaming school flowers together.

11 Wal-Mart supermarkets in Shanghai selling cartoon shapes nightlight were investigated, which easily caused electric shock to infants.

On March 18th, at the Wal-Mart Supermarket in Wujiaochang, Shanghai, the law enforcement officers of Shanghai Quality Supervision Bureau were checking the night light. The pictures in the text are all from The Paper reporter Zhu Weihui.

Nightlight can’t be made into a cartoon? It’s true.

On March 18th, the law enforcement officers of Shanghai Quality Supervision Bureau told The Paper (www.thepaper.cn) that the national standard does not allow nightlight to make cartoon shapes, which may interest infants and there is a risk of electric shock.

According to the Shanghai Municipal Bureau of Quality Supervision, according to statistics, 11 Wal-Mart supermarkets in Shanghai are suspected of unqualified nightlight, involving 10 models, 960 of which have been purchased and 800 have been sold. The quality supervision department has carried out centralized seizure of products suspected of quality problems, and will urge merchants to take the initiative to recall unqualified products according to the inspection results, and remind parents who are using similar unsafe products to stop using them as soon as possible.

National standard: nightlight can’t be made into cartoon shape.

At 9: 30 am on March 18th, law enforcement officers came to Wujiaochang Wal-Mart. At the counter of small household appliances, law enforcement officers carefully examined the nightlight products sold in the supermarket, and found that most of nightlight were made into cute cartoon figures, including bees, whales, strawberries, mushrooms, little yellow ducks and so on, which were very pleasing.

The Paper reporter noticed that these cartoon nightlight were placed in a prominent position on the shelves, and the price was much more expensive than the ordinary nightlight. For example, nightlight, a cartoon whale with its own "water spray" shape, sells for 33.9 yuan, while ordinary nightlight only sells 9.9 yuan.

Yang Bo, a law enforcement officer of the 4th detachment of the Law Enforcement Corps of Shanghai Quality Supervision Bureau, pointed out that after preliminary inspection, it was found that most of the nightlight sold in supermarkets did not meet the national standard-nightlight could not be made into cartoon shapes.

"These cartoon nightlight plug in the socket is very attractive, and it is very likely that infants will be interested in playing with their hands when they think they are toys. If it causes looseness between the socket and the plug, there is a risk of electric shock. In addition, these cartoon-shaped nightlight are often accompanied by some decorative parts, which will be eaten by children and lead to choking incidents. " Yang Bo said.

Yang Bo said that although the packaging of these cartoon nightlight is printed with 3C certification mark (compulsory product certification system), it does not mean that its quality is qualified. "It is very likely that the enterprise took the model of ordinary nightlight for certification in order to sell well, and changed its shape during production." He suggested that consumers should choose products with ordinary shapes when purchasing nightlight products, so as to prevent potential safety hazards.

After inspection and testing by law enforcement officers, it was found that some night lights were illegal in appearance, and the cartoon-shaped appearance was easy for children to play with and there was a danger of being electrocuted. Fire resistance is qualified.

Quality Supervision Department: Wal-Mart will be urged to voluntarily recall unqualified products.

Subsequently, law enforcement officers randomly unpacked a number of nightlight packages, and prepared to conduct fire-resistant experiments on their materials. Law enforcement officers adjusted the flame of the lighter to 12 mm high, and then aimed at the live parts of the night light for ignition experiments. It was found that although the materials of the charged parts showed signs of blackening and gave off a burnt smell, they were not ignited.

Law enforcement officials explained that flame retardants were added to the materials of these live parts to effectively prevent them from being ignited. "From the experimental point of view, the fire-resistant quality of the night light is still qualified. Why are live parts required to be fire-resistant? Because these night lights are plugged into the socket for a long time, it will inevitably cause short circuits and sparks. If the material wrapped in the line cannot be flame retardant, it may cause a fire. "

As the appearance of nightlight sold by Wal-Mart Supermarket does not meet the national standards, the Law Enforcement Corps of Shanghai Quality Supervision Bureau ordered the supermarket to immediately remove all the defective products and conduct further random inspection.

According to the Shanghai Municipal Bureau of Quality Supervision, according to statistics, 11 Wal-Mart supermarkets in Shanghai are suspected of unqualified nightlight, involving 10 models, 960 of which have been purchased and 800 have been sold. The quality supervision department has carried out centralized seizure of products suspected of quality problems, and will urge merchants to take the initiative to recall unqualified products according to the inspection results, and remind parents who are using similar unsafe products to stop using them as soon as possible.

Experts from the Shanghai Quality Supervision Department said that please pay attention to the following points when purchasing nightlight:

1. Location choice: Parents should check the distance between the socket and the bed. If it is not too close or too far, it is best to choose a movable night light, which can be placed in the most suitable position to provide soft but not too dark light for the baby.

2. Choice of lighting: nightlight with red or orange lighting is the best.

3. Selection of light bulb type: The type of light bulb also determines the heat of night light when it shines. LED light bulbs only release slight heat, while iodine tungsten lamp will become very hot when it shines.

4. Brightness of nightlight: nightlight aims to provide only soft light for the room. Parents who want to buy nightlight should go to regular supermarkets and shopping malls to buy products with certain brand awareness and national compulsory product certification.