China is the collective name of four poets: You Mao, Yang Wanli, Fan Chengda and Lu You. Also known as the four great masters of the Southern Song Dynasty. At that time, both Yang and Lu were famous. There are few works handed down by Mao; Although Yang and Fan are not as good as Lu You, they have their own characteristics. Yang Wanli rebelled against the rigidity of Jiangxi poetry school and created a lively and natural sincere style. The number of works handed down from generation to generation by Yang Wanli and Lu You is amazing. The four great poets in ZTE represent the second most prosperous period of poetry in Song Dynasty.