Huaisu

Huaisu (simplified Chinese: 怀素; traditional Chinese: 懷素; pinyin: Huáisù, 737–799),[1] courtesy name Zangzhen (藏真), was a Buddhist monk and calligrapher of the Tang dynasty, famous for his cursive calligraphy.

[3] He gained his national fame in his early thirties when he came to Chang'an, which was then the capital of China.

Famous poets of his time spoke highly of his works, including Li Bai.

Traditionally Huaisu is paired with the older Zhang Xu as the two greatest cursive calligraphers of the Tang dynasty.

The duo is affectionately referred to as "the crazy Zhang and the drunk Su" (顛張醉素).