佛祖統紀 23.6

23.6

天監元年（壬辰盡十八年）
普通元年（庚子盡七年）
大通元年（丁未盡八年）
大同元年（丁卯盡十二年）大同中。二祖文禪師。於北
朝河南。為思禪師說三觀。當東魏孝靜
帝天平間。
太清元年（丁卯盡三年）

Tianjian, 1st year (renchen, continuing for 18 years)
Putong, 1st year (gengzi, continuing for 7 years)
Datong, 1st year (dingwei, continuing for 8 years)
Datong, 1st year (dingmao, continuing for 12 years). During the Datong era, the Second Patriarch, Chan Master Wen, in Henan under the Northern Dynasty, expounded the three contemplations for Chan Master Si; this corresponded to the Tianping era of Emperor Xiaojing of the Eastern Wei.
Taiqing, 1st year (dingmao, continuing for 3 years)