The Regulations of Chan School emerged in the early Song dynasty was attributed to Baizhang Huaihai (749-814). However, as many scholars have indicated, this attribution is questionable. This article finds the first set of Chan monastic regulations established by Huaihai's disciples Baizhang Fazheng (d. 819) and others from the Yuan-dynasty Pure Regulations of Baizhang Monastery compiled by Dehui. Other transmitted Chan monastic regulations of Tang and Five Dynasties include Guishan Lingyou's (771-853) Admonitions of Dagui, Xuefeng Yicun's (822-908) Regulations of Masters, Yunmen Wenyan's (864-949) Left-over Admonitions. The article studies these regulations, analyzes the Buddhist monastic ethics embodied in them, and indicates that they provide inspiration and paradigm of ethical development and monastic management for contemporary humanistic Buddhism.