These 衆経 (or Tripitaka) were said to be called 'Issai-kyo Sutra' in the northern Wei dynasty, meaning the Pei dynasty (China), while they were called 'Tripitaka' in Liang (Nanchao), meaning the Nan dynasty (China); both titles were established in Sui and the beginning of the Tang dynasty, and the form of manuscripts were determined as comprising 17 letters in a line.
これらの衆経ないし三蔵を、北朝(中国)の北魏で「一切経」と呼び、南朝(中国)の梁(南朝)で「大蔵経」と呼んだといい、隋・唐初に及んで両者の名称が確立し、写経の書式も1行17字前後と定着した。