Unit 5 Section B 1a-2c 课件 2026-2027学年人教版英语九年级上册

Paper纸was a chinese invention two thousand years ago，chinese invented paper making. This drew was made of silk and was so expensive that only the emperor and aristocrats could afford to use IT. One thousand nine hundred years ago, a unit called泰伦improved the paper making process。He made cheap pink out of three barking rags. The improvement in paper making spread值，foreign, White and many different types of值were invented by chinese people。Suan paper, a kind of high quality rice paper that shows the charm of traditional chinese painting and collection phy. Jute paper is used to a transcribe chinese classics. Later, chinese food was spread to west. Through the silk ground, thousands of years of culture and civilization were recorded on true and past two different parts of the world. Kelland's improvement of powers making was an important achievement in the history of ancient chinese science and technology. Before thailand, people mainly use bamboo slip, widen slips and silk for writing. Bamble slips and widen slips are heavy and inconvenient to Carry, while silk is expensive, difficult to popular ize. After a long period of observation and practice, kyle summed up the experience of its producers. He uses bark pock Marks, regs, old fishing nets. After a series of complex process improvements, first, the raw materials are washed and shot, and so good in water to southern, and impurities and gums are removed by cooking to obtain a more pure fiber nex mash and stir to disperse the fibers evenly form pop, then spread the pope evenly on a flat plate filter and press with bamboo curtains or filters to remove excess moisture. Finally, after drying or drying, the paper is made skylines improved paper making technique, improve the quality of paper, reducing costs, allows paper to be master tizer and widely used. For example, before kyan improved paper making, due to the heaviness of bamboo slips and the high cost of silk, the dissemination of knowledge and the transmission of culture are severely restricted. The advent of paper making books easier and more economical IT has greatly promoted the popular zone of education and cultural exchange. For example, the previous delivery of documents was inefficient due to the inconvenience of writing materials, the lights and ease of writing a paper. This allows information to be disseminated more quickly and widely. Ky land's improved paper making is not only useful for china, and IT has had a profound impact on the development of world civilization. IT has made tremendous contributions to the insurance and development of human culture. 记得点赞关注哦。 Thousands of years ago, chinese people created amazing invention that changed the world. Paper making made IT easier for people to record and share knowledge. The compass help sailors find directions and explore the world. Gun powder was invented in ancient china. IT traveled from china to the world and influence human history. Movable type printing made IT is easier to produce books. IT helps spread knowledge around the world. The four great inventions were gifts from china to the world. They show the wisdom and creative, creative of chinese people. today. We should learn from the past, keep expLoring and create a Better future. The four grade inventions of ancient china paper making was developed by cylon of the eastern hund dynasty. On the basis of silk making, he used the plant fiber as the materials to make paper, which is suitable for writing. Printing was developed from the seals and stone graving and woodblock printing in the suian tongue dyn nasty in the song dynasty. Behung improved the traditional types and develop the movable type of printing, making printing faster and easier than before. Compass was developed from the ancient chinese people's observation on the magnetic force of magnet time. Later in the hunt dynasty, chinese people made a spoon light compass in the northern song dyna sty people further improved IT and developed the compass by using the method of artificial magnetization on iron needle. Gunpowder originated from the alchemy of tower ism in ancient china in the tank e dynasty, people began to use gunn powder for military purposes. The invention and communication of paper making, printing, gunpowder and compass have promoted the progress of word civilization. Presentation Unit5 Power of Ideas Section B How do we turn ideas into reality? (1a-2c) 阅读+词汇课公开课 单元主题范畴：人与社会 单元主题内容：科技与发明，科技发展对人类社会的影响 (2024新版)人教版 九年级(上册) Presentation Learning Objectives 1.通过阅读关于造纸术的语篇，获取古代书写材料、蔡伦改进造纸术的实验过程以及造纸术对世界的深远影响等关键信息，理解段落主旨和代词指代关系。（学习理解） 2.快速通读文章，完成段落与主题匹配任务；精读文本抓取关键细节，完成代词指代、表格填空、造纸流程排序题；依托文本信息梳理蔡伦造纸的背景、过程与造纸术带来的世界影响，能借助关键词复述造纸术的发展历程。(学习理解，应用实践) 3.结合文中古代中国造纸术的发明故事，小组交流探讨中国古代其他发明以及伟大发明家应具备的品质，感受古代中国科技智慧，树立创新思考、勇于实践的意识。(迁移创新) Presentation Watch and say What are all these things made of? What else can we use it for? They are all made of paper. Can we live a life without paper? What will be impossible if if there is no paper? We can't live easily without paper. We won't have books, newspapers or magazines. Information will be very hard to spread. Many things will become difficult. Before paper was invented, what did people use to write on? Do you know who improved papermaking in ancient China? Let’s watch! Pre-reading Presentation Watch and learn Let’s enjoy a video and fill in the blanks. 1. Paper, zhi, was a Chinese _________. 2. Paper-making ____ _______by Chinese 2,000 years ago. 3. This zhi _____ _____ of silk and was so ________ that only emperor and aristocrats could ________ to use it. 4. 1,900 years ago,Cai Lun ________ the paper-making process. He made cheap thin zhi ____ ____ tree bark and rags. 5. The __________ in paper-making spread zhi far and wide, and many different types of zhi ______ ______ by Chinese people. invention was invented was made expensive afford improved out of improvement were invented /əˈfɔːd/ v.；买得起；负担得起 Pre-reading Presentation Look and say 1a What material are these things made of？Find more things that are made of this material. paper bags book envelops lanterns These things are made of paper. magazine notebooks box napkin Papermaking plays an important part in our life. What do you know about the papermaking? Let’s start reading! Pre-reading Presentation Look and predict According to the title, what may the writer mention? The invention The inventor The inventing process The changes it brings ...... What do you expect to know from this text? Please brainstorm about three questions. ① Who invented/improved papermaking? ② How was paper made? ③ Why is papermaking a world-changing invention? Pre-reading Presentation Read and say Fast-reading Title: An Invention That Changed the World papermaking The passage is mainly about ____________________. What invention is the text about? an invention What may the passage be about? A. How paper was sold. B. How museums protect paper. C. How books are written. D. How paper was invented and changed the world. Presentation Read and choose Fast-reading 1. Where can we probably read this passage? A. A science fiction story B. A history & culture magazine C. A shopping advertisement D. A school geography textbook 2. What is the writer’s main purpose? A. To tell us how to make paper today B. To introduce the history and influence of papermaking C. To ask us to invent new things by ourselves D. To explain why Cai Lun was a famous emperor Presentation Read and say Fast-reading 1.How many parts can we divide the passage into? Tip:Look at the first and last paragraphs. Part.1(Para.1) Part.2( Para.2) Part.3(Para.3-4) Part.4( Para.5) Four. Part 1(_______): introduction Part 2(_______): problem Part 3(_______): solution Part 4(_______): influence Para.1 Para.2 Para.3-4 para.5 2.What’s the structure of this passage? C. D. B. A. Presentation Read and complete Careful-reading Read Para. 1 and complete the following tasks. 1.Choose the right answer. 1)How does the writer start to introduce the invention-papermaking? A. By listing numbers. B. By telling a story. C. By giving examples. D. By asking a question. 2) Why does the writer consider papermaking especially important? A. It helped information spread rapidly and shaped the modern world. B. It made books more beautiful and expensive. C. It allowed people to invent newspapers first. D. It completely replaced all other inventions. 2.It in Paragraph 1 refer to__________________. (课本P47 1C ) Part 1(Para.1): introduction papermaking Presentation Read and answer Careful-reading Part 2(Para.2): Problem 1.What kind of materials can be used for writing in ancient China? 2. What was the early paper in Western Han Dynasty made from? 3. What are the problems with all these materials? Imagine you write on bamboo or silk. What troubles will you meet? Animal bones,bronze ware, stones, wood, bamboo, silk Jute--a fibre that comes from plants. All these materials were either difficult to use and store,or very expensive. Heavy and takes up lots of space. hard to carry, expensive. not convenient for writing. animal bones bronze wares /brɒnz/ n.青铜 /weə(r)/ n.制品；陶器 stones /stəʊn/ n. 石头；岩石 bamboo silk jute Presentation Read and fill Read Para. 2 again and fill in the blanks. Part 2(Para.2): Problem Careful-reading Time Writing materials What were they made from? Problems Ancient China , bronze ware, , , bamboo and silk animals, , stones, trees and silk difficult to and , or very 。 an early of paper —a from plants animal bones stones wood metals Western Han Dynasty form jute fibre use store expensive Presentation Read and answer Careful-reading Read Para. 3 and then answer the questions. Part 3(para.3&4): solution 1. Who wanted to solve the problem of writing materials? 2. Where did Cai Lun get his new idea? 3. Lots of people saw bark and old clothes at that time. Why was it Cai Lun who came up with this great idea? 4.What do you think of Cai Lun? Cai Lun. From past experiences. He knew some kinds of bark were used to make clothes. /bɑːk/ n.树皮 He kept observing life and thinking about the problem all the time. L He was careful, creative and good at solving problems. Presentation Read and fill Careful-reading Read Para. 3 again and then fill in the blanks. Idea Reading clue Key information I — Identity Who was Cai Lun? the of the palace . D — . What problem did he face? Different methods , but none were . E — Experience What did he learn from ? Some kinds of bark . make clothes. A — Answer What new idea did he get? Use bark, and old clothes to make a writing material. head officer workshop Difficulty were tried ideal past experiences were used to certain plants suitable Presentation Read and fill Read Para. 3~4 and then fill in the chart. Question Cai Lun’s paper What was used to make it?(materials) _______, ______________ and ____________could be used to make a special material suitable to write on. What was it like? (advantages) This paper was_____, ______, _____________________, and________________. Part. 3(Para.3&4): solution Bark certain plants old clothes soft light easy to make and use cheap Presentation Read and complete Careful-reading Read Para. 2 , 3 and 4 again and complete the table. Question What was it like? What was used to make it? Material to write on before Cai Lun Cai Lun’s paper Difficult to use and store, or very expensive soft, light, easy to use and make. Cheap, /ɪkˈspensɪv/ adj.昂贵的 Animal bones, bronze ware, stones, wood, bamboo ,silk and jute Bark, certain plants and old clothes. 1d Presentation Read and number 1e Read Para. 4 again and put the sentences in order. In the first step of Cai Lun’s experiment, all the ingredients were mixed and boiled in water. Then, this material was beaten, cut up, and mixed with water again. Next, the liquid was poured over a bamboo screen, leaving just the fibre. Finally, this fibre was dried and pressed to form paper. To everyone’s surprise, this paper was soft, light, easy to make and use, and most importantly, cheap. In 105 CE, Cai Lun showed his creation to the emperor. The emperor was very pleased and praised Cai Lun for his great work. 1.Circle the words showing order: ----Signal words 2.Put the sentences in order. ----Track the process ______A. The material was beaten, cut up, and mixed with water. ______B. All the ingredients were mixed and boiled in water. ______C. The fibre was dried and pressed to form paper. ______D. The liquid was poured over a bamboo screen, leaving just the fibre. Tip:Order words help us understand and retell a process clearly.   1 2 3 4 /ˈlɪkwɪd/ n.液体 adj.液体的 Tip:In a process text, passive voice focuses on what is done to the material.  动作词链:mix and boil → beat,cut and mix → pour → dry and press Careful-reading Presentation Look and retell Careful-reading In the first step of Cai Lun’s experiment, all the ingredients were mixed and boiled in water. Then, this material was beaten, cut up, and mixed with water again. Next, the liquid was poured over a bamboo screen, leaving just the fibre. Finally, this fibre was dried and pressed to form paper. To everyone’s surprise, this paper was soft, light, easy to make and use, and most importantly, cheap. In 105 CE, Cai Lun showed his creation to the emperor. The emperor was very pleased and praised Cai Lun for his great work. 1e Then retell the process of making paper in your own words. Step 1 Mix and ____ all ingredients in water. Step 2 Beat, cut up the material and _____ it with water again. Step3 Pour the liquid over a bamboo screen, leaving just the_____ Step 4 _______ and press the fibre to make paper. boil mix fibre dried Presentation Watch and say Careful-reading Presentation Read and complete Careful-reading Read Para. 4 again and complete the following tasks. Cai Lun’s paper Features Weight Touch Production and use Price 1.Evaluate the paper In the first step of Cai Lun’s experiment, all the ingredients were mixed and boiled in water. Then, this material was beaten, cut up, and mixed with water again. Next, the liquid was poured over a bamboo screen, leaving just the fibre. Finally, this fibre was dried and pressed to form paper. To everyone’s surprise, this paper was soft, light, easy to make and use, and most importantly, cheap. In 105 CE, Cai Lun showed his creation to the emperor. The emperor was very pleased and praised Cai Lun for his great work. 2.What proved that Cai Lun’s experiment was successful? light soft easy to make and use cheap The emperor was pleased and praised him. Deep-thinking:What made Cai Lun’s experiment successful? Suitable materials, clear steps and repeated experiments made it successful. Presentation Read and answer Careful-reading Part.4(para.5): Influence Read Part. 4 and answer the questions. 1.What influences did the papermaking technique bring? 2.How did papermaking spread to other regions? 3.What two great influences did papermaking and printing bring together? It not only speeded up the development of Chinese culture, but also changed civilizations around the world. It first spread to China’s neighbouring countries and finally reached Europe through Arab countries in the 12th century. It led to a rapid increase in the number of books.This resulted in a new birth of knowledge, creating the world we have today. Tip:Words such as “led to” and “resulted in” show a cause- and-effect relationship. Presentation Read and say Careful-reading Read Para. 5 again and find out what these pronouns refer to. 1e It in Paragraph 5 refers to______________________. it in Paragraph 5 refers to______________________. This in Paragraph 5 refers to______________________. the papermaking techniqu the use of paper and printing a rapid increase in number of books. Understanding reference words Noticing what pronouns refer to will help you understand how different parts of the reading are connected. Presentation Read and fill Read the passage again and fill in the blanks. Can you a world without books, newspapers, or ? All of these things one invention—papermaking. It, any other invention, the rapid spread of information that our modern world. In ancient China, many different materials write on, animal bones, , stones, wood, bamboo, and even silk. In the Western Han Dynasty, there was also a very of paper made from jute—a fibre that comes from plants. , all of these materials were either difficult to use and store, or very . As the of the for the emperor in the Eastern Han Dynasty, Cai Lun trying to solve the problem. Different methods for creating something to were tried, but none were . In his time, some kinds of —the outer part of trees—were used to make clothes. From past experiences, Cai Lun that bark, certain plants, and old imagine magazines depend on was responsible for shaped were used to such as bronze ware early form However expensive head officer palace workshop became interested in write on ideal bark got the idea 想象 杂志 依靠；取决于 超过；不仅仅 促成；对…… 负有责任 被用来 例如；比如 青铜器 早期形态 然而；可是 主管官员 宫廷作坊 对…… 产生兴趣 在上面书写 理想的；合适的 树皮 萌生想法；想到 more than 昂贵的 塑造；影响 Careful-reading Presentation Read and fill Careful-reading clothes could be used to make a special material to write on. In the first step of Cai Lun’s experiment, all the were mixed and boiled in water. Then, this material was beaten, , and mixed with water again. Next, the liquid was poured over a , leaving just the fibre. Finally, this fibre was dried and pressed to form paper. this paper was soft, light, easy to make and use, and , cheap. In 105 CE, Cai Lun showed his to the emperor. The emperor was very and praised Cai Lun for his great work. , the papermaking technique not only the development of Chinese culture, but also around the world. It first spread to China’s and finally reached Europe through 。in the 12th century. When the use of paper and printing in later centuries, it a rapid increase in the number of books. This a of knowledge, creating the world we have today. suitable cut up bamboo screen To everyone’s surprise, creation pleased Later on speeded up changed civilizations neighbouring countries Arab countries came together led to resulted in new birth 合适的 原料；材料 竹帘 令所有人惊讶的是 最重要的是 发明；创作物 满意的；高兴的 后来 加速 改变文明 邻国 阿拉伯国家 结合在一起 导致；带来 造成；引发 新生 Read the passage again and fill in the blanks. ingredients most importantly 切碎 Presentation Listen and repeat Post-reading Presentation Watch and imitate Post-reading Presentation Discuss and say Post-reading Discuss in groups: 1.What other ancient Chinese inventions do you know? How was the world changed by them? I know gun‑powder, the compass and printing. The compass helped people travel and sail across the sea. Gun‑powder changed wars. Printing helped people spread knowledge quickly. These inventions greatly pushed the progress of the whole world. 1f Presentation Discuss and say Post-reading 1f Discuss in groups: 2.What qualities do you think a great inventor has? Great inventors curiosity observation creativity courage persistence wisdom experience Idea Exploration Reality Patience Courage Presentation Watch and say Post-reading Presentation Discuss and say Discuss in groups: What made Cai Lun finally succeed? If there were no Cai Lun’s paper, how might history be different? He had curiosity and careful observation. He kept trying different materials and learned from experience. Also, he was patient and never gave up. People still used expensive or heavy materials to write on. Knowledge spread much more slowly. Fewer books could be created, and cultures could not develop so quickly around the world. Presentation Look and say Post-reading Presentation Look and say Vocabulary in use Complete the table with different forms of the words. You can add more. 2a Noun Verb Adjective collect creative invent product collection creation invention produce create collective inventive productive inventor production creator collector producer Suffixes can change the part of speech of a word. Learning word suffixes helps us memorize English words much faster and easier. Presentation Look and say Let’s add more 1. direct ________________ 2. protect ________________ 3. develop ________________ 4. perform ________________ 5. invent ________________ 6. work ________________ 7. appear ________________ 8. explore ________________ direction protection development performer inventor worker appearance explorer director performance invention exploration V n Vocabulary in use Presentation Look and say 1. surprise ________________ 2. interest ________________ 3. enjoy ________________ 4. attract ________________ 5. excite ________________ 6. accept ________________ 7. relax ________________ 8. impress ________________ surprised  interesting enjoyable attractive excited acceptable  relaxed  impressive  interested exciting relaxing surprising Let’s add more V adj Vocabulary in use 动词尾是 t / te 去 e 加上 -ion → 名词（事情、物品） 末尾加上 -ive → 形容词（有…… 特性） -or/-er 表人物，千万不要弄混淆！ 课堂易简口诀 Presentation Read and choose 2b Choose the correct word to complete each sentence. 1. The use of modern medicine has helped control / spread many dangerous diseases. 2. News could travel much more rapidly / slowly with inventions like the radio and the television. 3.Fibre made from oil provides a(n) cheap / expensive solution to the problem that many people cannot afford to buy enough clothes. 4. A film was invented / produced by a film company to tell us about what robots could do for people’s lives in the future. 5. In January 1911, Feng Ru carried out a secret / public test flight in Oakland City. He showed the world what Chinese people could achieve. /ˈræpɪdli/ adv.迅速地；快速地 /əˈfɔːd/ v.买得起；能做 /ˈkʌmpəni/ n.公司；陪伴 现代药物的使用 帮助控制 危险的疾病 传播得快得多 石油制成的纤维（过去分词作后置定语） 为…… 提供廉价解决方案 cannot afford to do sth. 负担不起做某事 进行一次公开试飞 中国人能够取得的成就 Vocabulary in use Presentation Look and say 1e Complete the passage with the correct forms of the phrases in the box. Then discuss how an invention like sticky notes is turned into reality. Vocabulary in use piece of stand up result in to sb’s surprise Did you know that an accident led to the invention of sticky notes? In 1968, a scientist named Spencer Silver was trying to make a strong glue. ________________, he produced a glue that was really weak. It could stick things, but it could be removed very easily. The glue was interesting, but no one could find a use for it. Then, in 1974, a man named Arthur Fry was trying to mark the pages in a song book using small _________ paper. However, whenever he _______ to sing, the pieces fell to the floor. Then he remembered Silver’s glue. With the glue, the paper stayed in the song book, but it could later be removed. Fry’s idea ___________ the production of sticky notes of many sizes and colours. They gradually became popular and now are widely used all over the world. 一张；一片；一块 站起来 造成；导致 令某人惊讶的是 To his surprise pieces of stood up resulted in /prəˈdʌkʃn/ n.生产；制作 /ˈɡrædʒuəli/ adv.逐渐地；逐步地 /ˈwaɪdli/ adv.广泛地；普遍地 lead to 导致 便利贴 /ˈstɪki/ adj.黏（性）的；闷热的 强力胶水 粘贴物品 被移除 找到它的用途 标记页码 掉到地上 …… 的生产 被广泛使用 Presentation Read and choose Complete the task after reading. Vocabulary in use A. The two famous scientists Spencer Silver and Arthur Fry. B. How sticky notes were invented from an unexpected accident.C. Different kinds of sticky notes in many sizes and colours.D. How to make weak glue that can be easily removed. What is the passage mainly about? Presentation What did Silver want to make at first? He wanted to make strong glue. What problem did Arthur Fry meet with his paper markers? When he stood up to sing, small pieces of paper fell down. What finally led to the production of sticky notes? Fry’s good idea (and Silver’s weak glue). Answer the following questions according to the text. Read and answer Vocabulary in use Presentation Read and complete Vocabulary in use Complete the process of this invention. To make strong glue Weak glue was made No use To mark song book Paper fell down Thought of weak glue Sticky notes were invented Silver Fry Please retell it! Presentation Think and say Vocabulary in use What can we learn from the invention of sticky notes? Accidents can bring new inventions. We should be observant and creative when we meet mistakes. Presentation Class test 根据汉语意思完成句子，每空一词。 1. 后来，那对夫妇从城市搬到了村庄。 ______ ______, the couple moved from the city to the village. 2.「2025 四川达州中考改编」超重很容易导致多种疾病。 Overweight can easily ______ ______ many kinds of diseases. 3. 他认为人造二氧化碳直接引起了全球变暖。 He believes that man‑made carbon dioxide is directly __________ ______ global warming. Later on lead to responsible for 4. 发明大大加快了我们的生活，以至于它们经常让我们感到焦虑。 Inventions have ______ ______ our lives so much that they often leave us feeling stressed. 5.人们相信，阅读不仅有利于我们的自我发展，而且很容易做到。 It is believed that reading is ______ ______ good for our self‑development ______ ______ quite easy to do. speeded up not only but also Presentation Must do: Finish the exercises about the text and sort out the process of papermaking. Choose to do: 1. Try to retell the story of Cai Lun to your family in English. 2. Think of one invention you like most and prepare a short introduction. $人的一生离不开纸。婴儿咕咕。坠地时的出生卡纸，少年奋笔疾书时的试卷纸，青年情窦初开时寄出的牛皮纸信件，老人聚精会神练习书法时的宣纸纸张陪伴我们一路成长，但你是否知道纸的寿命有多长呢？ Can you imagine a world without books, newspapers or magazines? All of these things depend on one invention. Paper making IT, more than any other invention, was responsible for the rapid spread of information that shape our modern world. In ancient china. Many different materials were used to write on, such as animal bones, ROM, swear stones, wood, bamboo, and even soak in the western han dynasty. There was also a very early form of paper made from due of fiber that comes from plants. However, all of these materials were either difficult to use in store or very expensive. As the head officer of the palace workshop for the emperor in the eastern hand, dyna sty, thi lomb became interested in trying to solve the problem. Different methods for creating something to write on or tried, but none were ideal in this time, some kinds of bark, the outer part of trees, were used to make clothes. From past experiences, solon got the idea that bark, certain plants and old clothes could be used to make a special material or suitable to write on. In the first step of thy land's experiment, all the ingredients were mixed and boiled in water. Then this material was being cut up and mixed with water again. Next, the liquid was poured over a bamboo screen, leaving just the fiber. Finally, this fiber was dried and pressed to form paper. To everyone s surprise, this paper was soft, light, easy to make and use, and most importantly, cheap. In one hundred five ce sideline showed his creation to the emperor. The emperor was very pleased and praised side on for his great work later on, the paper making technique not only speeded up the development of chinese culture, but also change civilizations around the world. IT first spread to china's neighbor countries and finally reached the europe through arab countries in the twelve century. When the use of paper and printing came together in later centuries, IT LED to a rapid increase in the number of books. This resulted in a new birth of knowledge creating the world we have today. An invention that changed the world. Can you imagine a world without books, newspapers or magazines? All of these things depend on one invention. Paper making IT, more than any other invention, was responsible for the rapid spread of information that shaped our modern world in ancient china, many different materials were used to write on, such as animal bones, bronze wares, stones, would, bamboo and even silk. In the western han dynasty, there was also a very early form of paper made from juice, a fiber that comes from plants. However, all of these materials were either difficult to use in store or very expensive. As the head officer of the palace workshop for the empty in the eastern han dynasty, 蔡伦became interested trying to solve the problem。Different methods for creating something to write on were tried, but none were ideal in his time, some kinds of bark, the outside part of trees were used to make cloth. From past experiences, 蔡伦got the idea that bark，certain plants and old clothes could be used to make a special material suitable to write on. In the first step of蔡伦experiment，all the ingredients were mixed and boiled in water. Then this material was beaten, cut up and mixed with water again. Next, the liquid was poured over a bamboo screen, leaving just the fiber. Finally, this fiber was dried and presto form paper. To everyone surprise, this paper was soft, light, easy to make and use, and most importantly, cheap. In one hundred five ce, 蔡伦showed his creation to the emperor。The emperor was very pleased and praised蔡伦for his great work。Later on, the paper making technique did not only speed up the development of chinese culture, but also changed civilizations around the world. IT first spread to china's neighboring countries and finally reached europe through arabic countries in the twelve century. When the use of paper and printing came together in later centuries IT LED to a rapid increase in the number of books. This resulted in a new birth of knowledge creating the world we have today.