The teaching of San-lun, including Mulamadhyamaka-karika(中論)、Catacastra(百論)、Dvadacamukha-castra(十二門論), had been active in SHU-TANG dynasty, and it was once regarded as a typical representative of southern Buddhism's teaching. The Buddhism history of Chinese generally named the monks groups as San-lun school and arranged the order of masters. But San-lun school had never been discussed in Tang-Sung dynasty. The words, San-lun, indicate the purpose of the classical. When the monks of Fa-shiang school、Hua-yen school、Tian-tai schooland Chan school active at northern and sour then of China in Tang-Sung dynasty, the monks of San-lun school disappeared silently. As a result, the works of scholars in Sung dynasty seemed never to know what San-lun school was, not mentioned the order of masters. Therefore, the understanding of the development of San-lun 's teaching has not fallen into the same treat between then and now. According to Japan's Buddhism history, the San-lun school firstly definite as a school and arranged the order of masters at Ba-tzung Gung-yau (八宗綱要) that work belonged to a Japanese monk, Nen-ran (凝然) in 13th century. But at the same time it was in Tang-Sung dynasty in China. The essay aims at realizing that the discussion of San-lun school has been influenced by Japan's history and it has never appeared at Chinese Buddhism history after Tang dynasty.
