1, Cheng, Shikai. -"The Book of the Later Han Dynasty: Wang Si Chuan Jing of Guangling"

2, the song "Yangchun", there will be few harmonies; Under the fame, it is really difficult to be a deputy. -Were Han Shu

3, it is really difficult to have a reputation. -"The Book of the Later Han Dynasty"

4. Where there is a will, there is a way. -"The Biography of Were Geng Yan"