The collection of Changsha Jianxu Museum is mainly about 100,000 pieces of Jianxuan Wu of the Three Kingdoms unearthed in Changsha and more than 20,000 pieces of Jianxuan in the early years of the West Han Dynasty. The earliest paper artifacts found are from the West Han Dynasty, and Cailun of the East Han Dynasty is not the ancestor of papermaking, but has improved papermaking. The government documents in the three countries were still written in bamboo and wood, indicating that the paper had not been officially recognized at that time, and the use was only in the folk, and it was not popular.