Who was Sun Shusheng in the Tang Dynasty?

Sun Shusheng in Tang Dynasty, whose original name was Sun (646 ~ 69 1), was a famous honest man. Hangzhou Fuyang (Zhejiang) people. One is Liu Chen (the south of the river is blocked). Calligraphers and calligraphy theorists. There are two books handed down from generation to generation, namely, Bi Shu Pu, Bi Qian Zi and Bi Jing Fu Dian Fu, which are regarded as one of the "three outstanding figures in the Tang Dynasty". In the early Tang Dynasty, a great poet wrote an epitaph for Sun Jun, who was in charge of politics. On Sun Jun in charge of politics compared him to Zhong You, a great calligrapher in the Three Kingdoms period. Ancient poems and posts are now in Liaoning Museum.