Cai Lun Memorial Park is located in the central part of Hunan Province. It is named after the Lei River flowing through it. It is the place where Shennong created the "Lei Si" and the hometown of Cai Lun, the "Paper Saint". There are rich cultural heritages related to Cai Lun and his papermaking skills. These precious papermaking cultural heritages have proven the long history of papermaking in Leiyang.