In which dynasty was Cai Lun papermaking invented: Qin Dynasty, Han Dynasty and Tang Dynasty?

Cai Lun improved papermaking in the Eastern Han Dynasty.

Cai Lun (? -12 1) from Guiyang county in the eastern Han dynasty. In the last years of Han Yongping, he entered the palace as a minister. In the second year of Zhanghe (AD 88), Cai Lun was promoted to be a regular servant because of his meritorious service to the Empress Dowager, and Cai Lun also held an official position. Cai Lun summed up people's paper-making experience in the past, innovated the paper-making technology, and finally made "Cai Hou Paper". In the first year of Yuan Xing (A.D. 105), it was reported to the imperial court, and Han and Emperor ordered the popularization of his papermaking method. In the first year of Jianguang (A.D. 12 1), he committed suicide because of a power struggle.

Cai Lun's papermaking is listed as the "Four Great Inventions" in ancient China, which has made outstanding contributions to the spread of human culture and the progress of world civilization, and has been respected by people for thousands of years. It is regarded as the originator of papermaking and the "paper god" by papermaking workers. Mack hart listed 100 celebrities who influenced the course of human history, and Cai Lun ranked seventh. Cai Lun was listed as "the best inventor of all time" by Time magazine. The opening ceremony of the 2008 Beijing Olympic Games showed the papermaking invented by Cai Lun.