Before paper appeared and was cheap enough to wipe out dirt, the materials that people used to clean up after the toilet included water, cloth, leaves, corn cob, wood and bamboo chips (toilet chips), and lumps.
The earliest records of using paper in China were found in the Northern and Southern Dynasties. In the third biography of Yuan History, the wife of Yuan Yuzong was extremely filial, and he served his mother-in-law, Empress Zhao Ruishun (Queen Chabi).
In the 41th episode of "Dream of Red Mansions", Grandma Liu suddenly felt diarrhea in Grand View Garden, so he "busyly pulled a little girl and asked for two pieces of paper to undress", indicating that it was common for civilians in the Qing Dynasty to wipe the paper with dirt. However, in the early years of the Republic of China, people's livelihoods were generally poor, and many people still used tiles or corn stalks to remove pollution, and did not gradually switch back to paper until the economy recovered.
Cai Lun invented paper two thousand years ago and changed the history of writing. In the 19th century, wood pulp was used to make paper.