Who influenced Chu Suiliang's calligraphy?

When Li Shimin was dying, Emperor Taizong called Sun Chang Wuji and Chu Suiliang to his bedroom and entrusted Li Zhi to them. He also told Li Zhi that with Sun Chang Wuji and Chu Suiliang around, state affairs would be eased. Later, Li Zhi ascended the throne. At first, Li Zhi was promoted to Chu Suiliang, and later he was demoted to the same state secretariat. Three years later, he recalled Chu Suiliang and entrusted him with a heavy responsibility. After that, Chu Suiliang became an official and imperial academy, and later became a doctor of Guanglu. In a word, this period is the peak of Chu Suiliang's political career.

However, Li Zhi wanted to make Wu Zhao the queen, which was strongly opposed by Sun Chang Wuji and Chu Suiliang. Chu Suiliang also sent an article to throw cold water on Li Zhi. Chu Suiliang also assumed a posture of death, took off his official hat and buckled his head. Li Zhi was very angry with such behavior, which also changed the fate of Chu Suiliang. Later, when Wu Zhao became the queen, Chu Suiliang was driven out of the court by Wu Zhao, and was demoted to the present Changsha viceroy, and then demoted again and again until he arrived in Hanoi, Vietnam. Later, in desperation, Chu Suiliang wrote a letter to Li Zhi, pleading with Li Zhi, but it was useless.