Sun was admitted to the scholar of Sui Dynasty in his early years and was appointed as the history of Dali Temple at the end of the great cause. He is a talented junior official. After the death of the Sui Dynasty, he became an official in the Tang Dynasty. In the early years of Wude, he wrote to Gaozu and confessed three things: first, "clearing the way"; Second, abolish the "100 operas and Sanqu"; Third, please "carefully choose the friends of the Crown Prince and the king". Gaozu was overjoyed after reading it, and used it as a book to help the empire and gave 300 silks. Soon after Wang He and Dou Jiande were destroyed, Sun suggested that Li Yuan cancel the order to investigate Wang Dou's residual party member, and made frequent suggestions to pacify the border defense and reduce taxes, and invited the post of "remonstrating officer", which was adopted by Gaozu.
In the fifth year of Wude, Sun was relieved of his official position because of negligence. At that time, the imperial examination system was not yet complete, and Sun could be relieved of his official position. He should take the Jinshi examination and win the first place in the examination, and the official would award the criminal name to the doctor. In the first year of Zhenguan (627), Emperor Taizong suggested stopping hunting, riding and shooting, which was adopted. Zhenguan was exempted from official duties for five years and was put into use soon. In the fourteenth year of Zhenguan (64 1), he worshipped Dali Qing and became an important official of the imperial court. In the fifth year of Yonghui (654), Tang Gaozong resigned due to old age, and in the third year of Xianqing (658), he died at home.
Sun Zhonghou, who dares to speak out, has the wind. He is open-minded, calm, and not surprised by honor or disgrace. When you worship a book to help you advise, you have to make an order first, but you will keep it a secret when you return home. When the court made an official document, the family was ecstatic, but Sun was as if nothing had happened.