In the South Song Dynasty, the social position of the imperial clan becamelower and lower. There were 12 clan members in poetic school of rivers and lake. Compare with the other poets of poetic school, the status of the imperial clan had a great influence on their poems. There were two reasons. Firstly, they had a double identity. Because they were not only the relatives of the emperor, but also the ministers of the emperor. Secondly, they were different from those ordinary poems, because they didn’t write poems of Gan Ye.