Abstract
Chengxin lun (_??__??__??__??__??_) is a Dunhuang Chan Manuscript found in seven copies. The several studies have been made on this text. First, Mr. Daisetu Suzuki (_??__??__??__??_) and Mr. Ryosho Tanaka (_??__??__??__??_) introduced the text as an early Chan work. On the other hand, Mr. Shindai Sekiguchi (_??__??__??__??_) asserted it to have a connection with Tiantai Zhiyi's thought (_??__??__??__??_) in his work named ‘Study on the Great Master Bodhidharmza’ (_??__??__??__??__??__??__??__??__??_).
So in this article, I will reexamine and revise of the Chengxin lun.
