Liu Xin
At the end of Western Han Dynasty, scholar Liu Xin proposed to establish professorship for "Zuo Zhuan" and ‘’Guliang Zhuan". Once his advice was adopted, Gongyang school no longer monopolized the official interpretation of Spring and Autumn Annals. From the time of the Eastern Han Dynasty onwards, more and more people criticized Dong Zhongshu's interpretation of the "Gongyang Zhuan".