The Development History of Paper

　The earliest paper dates back 2200 years to the early Western Han Dynasty, but it was still rough and not widely used. In 105 AD, after improvement by Cai Lun of the Eastern Han Dynasty, he is considered the pioneer of modern papermaking. Development process. Paper is one of the the Four Great Inventions in ancient China. Together with the compass, gunpowder and printing, it provides the material and technological basis for the...