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　　The new semester is just around the corner, and many colleges and universities "meet with each other deeply" with "a piece of plain paper" full of heart — —

　　Do you understand the "secrets" and words in the admission notice?

　　 Harbin institute of technology admission notice information picture

　　Zhejiang A&F University Admission Notice Photo by Chen Shengwei/Bright Picture

　　Tsinghua University Admission Notice Information Picture

　　University of Science and Technology Beijing Admission Notice Information Picture

　　Handwritten admission notice information of students of Fudan University Painting and Calligraphy Association. Information picture

　　[narrating]

　　editorial comment/note

　　This summer, the admission notices of many colleges and universities were "fire". In the first "intimate contact" between freshmen and the university, the admission notices showing the history and culture of the university and bearing the characteristics and achievements of running a school are like "messengers", conveying the value pursuit and humanistic spirit of the school to freshmen.

　　What are the touching stories and ardent expectations behind the admission notice of "Fire"? We will take you to several teams involved in the design and production of admission notices, and in their speeches, we will feel the good intentions of "penetrating the paper" together.

　　Research and development of special coating escort "the country’s heavy weapon"

　　Narrator: Professor Wu Xiaohong, School of Chemistry and Chemical Engineering, Harbin Institute of Technology

　　This summer vacation, the special coating for spacecraft independently developed by our team was applied to bookmarks, and as part of the admission notice of Harbin Institute of Technology, we met the young students who were about to enter school.

　　Although the bookmark is small, it is full of science and technology, and the coating on it is very useful.

　　In 2017, I led the research team to participate in the development of the Tianwen-1 Mars orbiter. The flight of the orbiter from the earth to Mars is long and far away. How to keep the five-star red flag logo on the orbiter from fading and falling off in a long and extremely harsh environment? After more than a year of intense research, we have developed a special coating material with radiation resistance, low volatility and high and low temperature alternating resistance, and printed it on aluminum plate by special process, which solved this problem. On October 1st, 2020, during the National Day and Mid-Autumn Festival, when we saw the bright five-star red flag on the "Tianwen-1" ringer, we were deeply proud of our motherland’s birthday.

　　Resonant with the national major strategy at the same frequency, "based on aerospace, serving national defense and being good at engineering" is the long-term advantage of Harbin Institute of Technology. I have been thinking about how to combine my major with the needs of the country since I graduated as a doctor in 2003. After many investigations, I found an important link in the space field — — Coating the surface of spacecraft with functional coating is equivalent to putting on a multifunctional "coat" to improve its performance and reliability, but traditional technology can no longer meet this requirement. To this end, I will develop a new generation of special functional coating and protection technology for spacecraft as my research direction, and I am determined to become the realization of spacecraft functions and the guardian of safety.

　　In 2009, China’s lunar exploration project Chang ‘e-3 encountered a weight loss problem, and it was urgent to replace aluminum alloy with magnesium alloy chassis, but its application premise was to break through the technical bottleneck that it was difficult to prepare high heat dissipation coating on the surface of magnesium alloy. It is very difficult to coat the surface of magnesium alloy with high bonding strength, and it is even more difficult to have high heat dissipation function. We innovate independently, find another way, and have passed thousands of experiments — Failure — In the process of re-testing, the in-situ growth technology of thermal control coating with high bonding strength and high heat dissipation capacity was finally invented, and the application of light magnesium alloy chassis in spacecraft was realized, which successfully boosted the "the Goddess Chang’e flying to the moon".

　　In 2015, the high-temperature resistant and light-removing black coating is needed in the development of China’s FY-4 meteorological satellite, which is an important core material to ensure the detection accuracy. However, the existing imported coatings have the risk of polluting the lens and cannot meet the requirements of use, so they must be independently developed. After receiving this arduous task, my team and I worked tirelessly day and night to successfully develop a low-pollution and high-performance matte black coating. In December 2016, the Fengyun-4 satellite was launched, and its comprehensive observation capability on the earth was leading the world.

　　In more than 20 years of scientific research work, we have caught up with the good times of vigorous development of China’s space industry. While making breakthroughs in scientific research, my team and I have gained valuable growth.

　　In the past, chemistry, materials, biology, and environment were rumored to be the four "Tiankeng" majors, which is actually a misunderstanding. The new material industry is a strategic and basic industry, and also a key field of high-tech competition. The country’s development of emerging industries and high technology can not be separated from materials, and its prospects are very broad. I think, this notice is to tell young students with our story: always combine your ideals and aspirations with the major needs of the country, and you can achieve a valuable life.

　　The paper that is not bad for thousands of years writes shining youth

　　Narrator: Yang Guanghui, Executive Vice President of Chinese Ancient Books Protection Institute of Fudan University.

　　This summer, the admission notice sent to every Fudan University freshman used a special kind of paper — — Kaihua paper In the words of president Jin Li, "it carries the ancient papermaking technology and Fudan advanced technology, and explains ‘ Be knowledgeable and determined, ask questions and think closely ’ The spirit of ". This "Chinese Romance" begins with Yang Yuliang, an academician of China Academy of Sciences, former president of Fudan University and president of China Ancient Books Protection Research Institute.

　　Traditional writing and printing materials — — Paper and ink are both polymer materials. For a long time, the core problem in the protection of ancient books is to repair materials, and the difficulty is the lack of paper suitable for repairing ancient books. As the first generation of polymer scientists trained in New China, Academician Yang Yuliang faced up to difficult problems and led the scientific research on core writing and printing materials such as paper and ink.

　　The eyes of exploration are cast on the people. Academician Yang gradually locked in the ancient paper "Kaihua Paper". He found that Huang Hongjian and others in Kaihua County, Quzhou, Zhejiang Province, had been engaged in the recovery process of kaihua paper for many years, but they were unable to find a way out for many years because of the lack of modern scientific and technical guidance. Therefore, Academician Yang personally visited Kaihua County and set up an academician workstation, which opened the prelude to the recovery of the newly opened paper technology.

　　Academician Yang started with the establishment of a biological and chemical research team related to paper research. Through field visits to Kaihua Paper, Jiangxi Qianshan Lianshi Paper, Sichuan Jiajiang Zhuangyuan Red Paper, Anhui Jingxian Xuan Paper, Fujian Liancheng Lianshi Paper, Japanese Mino Paper, Egyptian Cypress Paper, and Israeli Dead Sea Scroll (sheepskin Book), members of the team gradually learned about the production, restoration and application of handmade paper in the world, and visited the Writing Culture Research Center of Hamburg University in Germany.

　　Basically, the main papermaking raw material is Wikstroemia beijiangensis. However, there is a serious shortage of wild resources, poor standardization of collection, and lack of standardized process and index system for processing. To this end, Professor Zhong Yang, who is in the direction of biological research in the team, led the members to tackle key problems, fully analyzed the diversity and genetic structure of the varieties of Ligusticum wallichii, and gradually established an artificial rapid propagation system of papermaking plants based on artificial planting and tissue rapid propagation.

　　With raw materials, bleaching has become a new "roadblock". Dr. Xie Shoubin invented the "Non-destructive Bleaching Method", which used laccase to bleach the phloem fiber of Toona sinensis to a whiteness far exceeding that of rice paper, and the key factor that determines the paper life in pulp — — The polymerization degree of cellulose is not reduced at all, which can ensure the immortality of the paper for thousands of years. In addition, the team also put forward different paths and sequence of cellulose degradation in the paper of Kaihua Paper under the conditions of dry heat and wet heat. By measuring the degree of polymerization and crystallinity, the service life of newly-made Kaihua Paper was determined to ensure the quality of Kaihua Paper … …

　　With the intervention of science and technology, Kaihua paper has been reborn, used in the restoration of ancient books, printmaking and painting creation, and also used to make the admission notice of Fudan freshmen, showing the wonderful integration of science, humanities and art. Fudan students who received the admission notice of Kaihua Paper can also experience the integration of tradition and modernity, giving birth to endless imagination and enthusiasm. I expect them to use the pen of struggle to write the shining youth on the Millennium-old paper.

　　Steel as thin as cicada’s wings engraved with burning heart

　　Narrator: Fiona Fang, chief engineer of tinplate in Technical Research Institute of Shougang Group Co., Ltd. and Ph.D. student in materials science and engineering, University of Science and Technology Beijing.

　　The undergraduate admission notice of University of Science and Technology Beijing "steel as paper" made a stunning appearance. The main body was made of "5G steel" as thin as cicada’s wings and as light as a mirror, which was jointly developed by Beijing University of Science and Technology and Shougang. Behind the notice, there is a counterattack story of China’s scientific research team "from catching up to leading".

　　5G steel, also known as cicada wing steel, is famous for its thin thickness. To develop such a thin steel, it is a big problem to refine inclusions. For example, the thinnest thickness of high-end automobile panels is 0.5 mm, and the size of inclusions is required to be no more than 50 microns. The thinnest thickness of cicada wing steel is only 14% of the automobile panel, and the size of inclusions should be further reduced by more than 60%, and the maximum size should not exceed 20 microns. Only a few advanced steel enterprises in the world have mastered this technology, and the continuous casting cycle is long and the production efficiency is low.

　　We set up a scientific and technological team of Cicada Steel, and based on the clean steel production platform of Shougang Jingtang Company, put forward the idea of step-by-step control of inclusions. Based on the strategies of low oxygen tapping in converter, refining and anti-agglomeration, intensified removal of tundish and control of mold flow field, we took the lead in achieving high efficiency and high cleanliness.

　　After tackling the problem of inclusions, another bottleneck is ultra-thin tandem cold rolling. Generally speaking, the thinner and wider the steel, the more difficult it is to roll. In the field of low carbon steel technology, advanced steel enterprises at home and abroad adopt acid continuous rolling — Annealing — Double stand secondary cold rolling process, the international thinnest thickness is 0.10mm, and the maximum width-thickness ratio is 7500. Under the traditional technology, acid continuous rolling and secondary cold rolling have large reduction rate and high rolling load, and the specifications below 0.16 mm have high requirements on the control stability of tension and rolling force during secondary cold rolling, so it is extremely difficult to produce efficiently and stably.

　　Without precedent at home and abroad, team members "brainstorm" again and again. Since no breakthrough can be made under the existing conditions, why not change the existing conditions? Therefore, the team put the breakthrough point on the tension and decided to increase the tension to effectively reduce the rolling force, thus achieving thickness reduction.

　　In traditional rolling, the tension is usually 30%~50% of the yield strength of the material. If it is increased to more than 50%, it will easily lead to local cracking or even tensile fracture due to small fluctuations. Sure enough, at the beginning of the test, when the tension is increased to more than 60% of the yield strength, we often hear a bang — — Rolling belt breakage occurred. Sometimes, it even breaks two or three times a day. After careful analysis of the reasons, we finally found that the slight fluctuation of strip thickness will lead to tension fluctuation of more than 50%, which will lead to belt breakage. A new problem arises: how to reduce the tension fluctuation problem under large tension? After repeated explorations, we finally shortened the response time to one-third of the original by changing the traditional rolling strategy and control system, and achieved stable rolling with ultra-large tension. The thinnest thickness broke through from 0.10 mm to 0.07 mm, and the maximum width-to-thickness ratio broke through from 7,500 to 11,400, creating a new world record and strongly supporting the reduction of 5G equipment.

　　Nowadays, the annual output of iron and steel manufacturing industry in China ranks first in the world. We have won the top spot in many aspects, such as "cicada wing steel" and "hand-torn steel", but there are still many "stuck neck" problems to be overcome. I hope that the younger brothers and sisters who are about to enter the campus will cherish their youth and be brave enough to be the "steel backbone" on the road to rejuvenation.

　　Bamboo bearing brocade tells green stories.

　　Narrator: Wang Tao, head of the bamboo admission notice research and development team of Zhejiang A&F University.

　　Relying on the university’s scientific research advantages in the field of bamboo research and bamboo processing, we have developed the admission notice with bamboo as the raw material and micro-sliced bamboo technology as the core for 9 years in a row, and have been iteratively upgraded with new patented technologies, and the related technologies have won 8 national patents.

　　The research and development of bamboo admission notice began in March 2015. At that time, although the technology of slicing meager bamboo was mature, it was still difficult to make an admission notice. We spent nearly two months, through technical innovation and repeated printing of samples, and finally made a sample of admission notice with a thickness of 0.75~0.8 mm on May 30 of that year. In order to solve the problem that bamboo is easy to break when folded in half, every admission notice uses double-layer sliced bamboo, and ultra-thin non-woven cloth is embedded in the two-layer sliced bamboo, combined with laser breakpoint punching technology, which avoids the risk of breaking well. At the same time, advanced technologies such as hot pressing, anti-corrosion and printing are used to ensure that the admission notice is legible, pressure-resistant and folding-resistant, and easy to collect and preserve.

　　Since then, we have continuously tried to strengthen the strength of composite bamboo and reduce the thickness of the material, thus realizing various technological innovations. For example, in 2020, starting with the flexibility and mildew-proof technology of bamboo substrate, the characteristics of strong flexibility, arbitrary curling and folding, non-toxic, harmless and mildew-proof were realized; In 2021, the flexibility and light transmittance were further enhanced; In 2022, began to explore the country’s first 3D handmade bamboo admission notice … … Now, there is no waste water or waste liquid in the process of making our admission notice. The whole process is green and environmentally friendly by using modified starch adhesive and manual 3D production, which fully embodies the concept of ecological civilization.

　　The 2023 version of the admission notice not only continues to be hand-made in 3D, but also is thinner and firmer, with the thickness almost equal to that of three ordinary A4 sheets, which can be folded in half at will, pressed sideways, and even curled into a shaft like paper.

　　Bamboo is an important carrier to record history and culture, and also an eco-friendly material with strong carbon sequestration capacity. The bamboo admission notice not only has cultural attributes and scientific and technological content, but also conveys the value concept of advocating ecology, developing science and technology and promoting culture to freshmen.

　　Over the past few years, our design team has been expanding in the design, production and iterative upgrade of the admission notice. Looking forward to more green "seeds" sprouting and growing on campus, adding color to the beautiful China.

　　Project team: reporters John Zhang, Zhang Shiying, Yan Weiqi, Chen Peng, Lu Jian, Wang Simin Trainee reporter Li Jiaxin correspondent Chen Shengwei.

　　Liu Moulan, a 68-year-old man from Zhongxian County, Chongqing, died suddenly during the investigation in the law enforcement case handling center of Zhongxian Public Security Bureau. His family members thought that there was abuse of power during the police summons and interrogation, so they filed an administrative lawsuit.

　　The Paper learned from Liu Moulan’s daughter Rong Zhang on October 30th that the court has filed a case on this matter. According to the summons issued by Zhongxian People’s Court on the 29th, the case will be heard on December 3rd.

　　As of press time, Zhongxian Public Security Bureau has not responded to the relevant details, but confirmed that the judicial appraisal opinions held by family members are true. The judicial appraisal opinion mentioned that it is in line with "death caused by circulatory and respiratory failure caused by hypertensive heart disease".

　　Rong Zhang said that on the morning of August 19th, she and her mother, Liu Moulan, were taken to the county public security bureau for trial by the police of the Xinsheng Police Station in Zhongxian County. On the afternoon of that day, she finished the transcript, and in the evening, the police issued a decision to detain her for 15 days on suspicion of damaging other people’s property. In the meantime, his mother has been being questioned in the nearby interrogation room.

　　At 3 am on August 20th, the village cadres suddenly informed Rong Zhang’s relatives that Liu Moulan had died of "sudden illness" during the trial and was already in Zhongxian funeral home. On the 22nd, with the consent of family members, Zhongxian public security and procuratorial departments organized an autopsy on Liu Moulan.

　　The administrative penalty decision made by Zhongxian Public Security Bureau on August 19th shows that Liu Moulan and Rong Zhang intentionally damaged the service road contracted by others in the citrus orchard near their home on two afternoons in late July and one morning in early August this year. As confirmed by Zhongxian Price Certification Center, the repair cost of the damaged orchard service road was 1,500 yuan. According to the relevant provisions of the Public Security Administration Punishment Law, the public security organ gave Rong Zhang administrative detention for 15 days.

　　Rong Zhang’s judicial appraisal opinion issued by Chongqing Forensic Medical Examination Institute entrusted by Zhongxian Public Security Bureau shows that at 8 o’clock on August 19th, the police of the new police station of Zhongxian Public Security Bureau summoned Liu Moulan and Rong Zhang to the law enforcement case handling center of Zhongxian Public Security Bureau for investigation. At 23 o’clock that day, Liu Moulan suddenly collapsed on the ground when he came out from the toilet, and died after being rescued by Zhongxian People’s Hospital.

　　According to the emergency rescue records of Zhongxian People’s Hospital, 68-year-old Liu Moulan was admitted to the hospital at 23: 19 on August 19 because he "should not be called for 5 minutes". "He had a history of hypertension and diabetes in the past." After a series of emergency treatments, at 0: 19 on the 20th, Liu Moulan performed bedside electrocardiogram to prompt ventricular arrest and declared clinical death. The death was diagnosed as "sudden death".

　　The judicial appraisal opinion mentioned that after autopsy, no evidence of Liu Moulan’s mechanical asphyxia, air embolism, pulmonary thromboembolism and anaphylactic shock was found; Eliminate common poisoning deaths. It is in line with "death caused by circulatory and respiratory failure due to hypertensive heart disease".

　　Rong Zhang said that his mother never received targeted treatment for "hypertension and diabetes" during her lifetime, "did not take medicine, and was not hospitalized"; In addition, his mother has not received treatment for heart disease before. This time, in addition to filing an administrative lawsuit, they will also apply for a new autopsy.

The zhixing APP was officially put on the shelves, which is an application specially developed for cars in the cockpit. It can not only help car owners to control their cars and check their status, but also has an exchange community where car owners and prospective car owners can communicate with each other.

HarmonyOS Zhixing APP is another important measure of Huawei in the field of smart cars. It integrates a variety of functions and provides a new intelligent driving experience for car owners. Through this application, the owner can easily control various functions of the car, including navigation, music playback, air conditioning adjustment and so on. In addition, it also supports voice control, making driving more convenient and safe.

In addition to the control function, HarmonyOS Zhixing APP also has a wealth of information display functions. The owner can check the status information of the car through it, including fuel consumption, mileage, fault tips and so on. This information is presented in an intuitive and clear way, so that the owner can keep abreast of the running status of the car at any time.

The most exciting thing is that HarmonyOS Zhixing APP also has an exchange community. Here, car owners and prospective car owners can speak freely and share their driving experience and experience. The answer can be found here, whether it is about the skills of using a car or the advice and experience of buying a car. This community will become a platform for car owners to communicate and interact, so that everyone can grow together.

In a word, the launch of HarmonyOS Zhixing APP marks the further development of Huawei in the field of smart cars. It will bring a brand-new intelligent driving experience to car owners, so that they can better control their cars. At the same time, through the construction of exchange community, car owners can also learn from each other and make progress together. I believe that with the continuous upgrading and improvement of HarmonyOS Zhixing APP, it will bring more surprises and convenience to users.

1905 movie network news Directed by Toulup Van orman, the original animated films dubbed by Jason Sudeikis, Josh Gad, leslie jones, bill hader, Rachel Bloom, etc. exposed the "Together" version of the TV forecast, and the ice hockey hit Eagle Island. In the face of the survival crisis, the birds and the troublemakers finally "let bygones be bygones", and they will shoulder the heavy responsibility of saving their homes together with "Together". Pang Hong and Leonard called a group of experts to the frozen Eagle Island.

"The disaster of extinction" urged the old enemies to form an alliance for the first time, and the pigs and birds joined forces to "dance" against eagles

In the latest exposure of the "Together" version of the TV preview, I saw that the "Little Bird Trio" headed by Pang Hong was catapulting hot sauce at Pig Island with a slingshot. A pig eating burritos was unfortunately recruited, and Pang Hong and others immediately cheered the winner. This scene has long been used to pigs and birds who have been in love and killing each other for many years, until the ice hockey from Eagle Island hit the island where pigs and birds are located. The "special weapon" developed by the ice queen with great concentration has the power of conan the destroyer. In the face of life and death, the old enemy had to "bury the hatchet" and form an alliance to go to the frozen Eagle Island to fight against the ice queen.

So, under the leadership of Pang Hong and Leonard, partners with stunts such as Dart Yellow, Bomb Black and Invincible Condor all joined the team. With the blessing of Dr. Pig’s "black technology", they came to Eagle Island by submarine. Facing the heavily guarded Ice Queen’s residence, everyone successfully sneaked in by operating the "Trojan Eagle", and when they met the guards in a narrow way, they used their quick wits and performed the stunt of hilarious "awkward dance". Can the pig-bird alliance accomplish its mission under many difficulties?

Little cute sitting in rows brings excitement, and a summer hilarity is upgraded to a summer family fun.

In Angry Birds 2, in addition to the wonderful plot of the main characters fighting against eagles, there are many "cute" little guys, such as those three little birds, who hide an adventurous heart under their cute appearance, and "going into the ground" and "snatching eggs from Shekou" are not a problem for them. There is also the pet dog of the Ice Queen frozen in the ice, and the white seal that grabs fish and blinks. The addition of these cute animals adds a lot to the film.

It is worth mentioning that the film continues the dubbing lineup of the previous film. Peter Dinraki, who is famous for playing the role of "Little Devil" in Game of Thrones, will once again voice the "Invincible Condor" in the film, and the famous American singer "Spicy Chicken" will join the voice. The eldest daughter of "wonder woman" Gal Gadot and Nicole Kidman’s two daughters also appear in the dubbing lineup, among which gerga Duo’s eldest daughter is the one in the film. At the same time, Angry Birds 2, as a film made by a group of people with children, takes into account the needs of parents and the fun of children, and also allows children to learn something through movies, which is suitable for family watching in summer.

Angry Birds 2 will be released nationwide on August 16th.