Ko En, Son Puku, and Seki Kai 'considered humanity, justice, courtesy, and music as what needed to be learned' and were later called the three teachers of early Song by Oyo Shu (Ouyang Xiu, Ou-yang Hsiu).
胡エン・孫復・石介は「仁義礼楽を以て学と為」し、後に欧陽脩によって宋初三先生と称されている。