(1) Bamboo slips or silk.

(2) Early Western Han Dynasty.

(3) During the Eastern Han Dynasty, Cai Lun improved papermaking technology and made the first "Caihou paper".

(4) After the invention of papermaking, it gradually spread to all parts of the world, promoting cultural exchanges and the popularization of education, and profoundly affected the development process of world culture.

(5) The Sumerians used clay tablets, the Chaldeans used brick carvings, the Romans used copper plates, the Egyptians used papyrus, the Indians used white bark and palm leaves, and the Europeans used Sheepskin, Korean and Japanese bamboo slips and silk, etc.

(6) Nowadays, paper is widely used in people’s production and life: paper is used for painting, packaging and other purposes. Toilet paper, paper cups, paper boxes, paper towels, paper clothes and pants that people use; latte art for decoration at parties; spring couplets posted during the Chinese New Year; banknotes used every day; envelopes and stamps for writing letters, etc. are all made of paper .