This post was made by Chu Suiliang, who was summoned by Emperor Taizong of the Tang Dynasty to copy Wang Xizhi's regular script "Le Yi Lun" in regular script and gave it to Wei Zheng and other ministers. Chu Sui kindly integrated Yu and Ou's brushwork into one, with both square and round strokes, and smooth waves. He was more relaxed than his predecessors, and was deeply appreciated by Emperor Taizong Li Shimin of the Tang Dynasty. Li Shimin once showed Chu Wang Xizhi's calligraphy collected in the imperial palace and asked him to identify the authenticity. He made no mistakes, which shows that he was proficient in studying Wang Xizhi's calligraphy.