The Four Great Inventions of ancient ChinaPapermaking Printing GunpowderCompass 1 、 Papermaking When the paper appeared? What is to be made of? First paper appeared at Xi'an in the Western Han Dynasty, and it made by oakum . In 1986, a tomb in Tianshui of Gansu Province unearthed a paper map. According to appraisal of some experts ， this piece of paper is a plant fiber paper. 最早的纸出现在西汉时期的西安，是用麻絮来制成的。 1986 年，在甘肃省天水的一座古墓中 出土了一幅纸地图。经专家鉴定， 认为西汉时期的纸属于植物纤维纸。 Papermaking When it appeared that today's paper experience ? Who invented it? In Eastern Han Dynasty, Cai Lun summarized the experience, improved paper making, so this paper is also known as "Marquis Cai's paper." 如今的造纸经验在什么时候就出现了？由谁发明？ 东汉末年，蔡伦总结了造纸经验，改进了造纸法，所以这种纸又称为“蔡候纸”。 What raw materials used in Eastern Han Dynasty papermaking ? What is the process? Raw materials - bark, hemp head, rags, old fishing nets Process - Pulping, paper fishing, drying 东汉时造纸使用什么原料？有什么工序？ 原料——树皮、麻头、破布、旧鱼网 工序——制浆、捞纸、烘干 Papermaking papermaking propagation 4th century AD, introduced to the Korean, Vietnam. 7th century, introduced to Japan, the Arab region. 12th century, spread to Europe, Africa. 造纸术对外流传 公元 4 世纪，传入朝鲜、越南。 公元 7 世纪，传入日本、阿拉伯地区。 公元 12 世纪，传入欧洲、非洲。 2 、 Printing Printing How is the printing generated? The earliest books are copied by hand, but then it is also time-consuming and error-prone. Therefore ， printing generated . 印刷术是怎么样产生的？ 最早的书籍是用手来抄写的，但是这样既费时费力也容易出错。因此就产生的印刷术。 Most original printing - rubbing method. In 4th century AD, peopl...
