Paper, exactly Cai Hou paper, is one of the four major inventions of ancient China, which made a great contribution to the evolution of human civilization. Its inventor is Cai Lun. In the tomb of Cailun in Yangxian County, there is a small paper museum designed to promote the production process of Cai Hou paper and its similarities and similarities with other similar paper to let more people truly understand Cai Lun and paper.