Aisingiorro Yongxun (1752- 1823), the eleventh son of Emperor Qianlong, walked in the Ministry of War during the Jiaqing period. He studied Zhao Mengfu's calligraphy first, then Ou Yangxun's calligraphy characteristics, and copied the calligraphy of Jin, Tang, Song and Ming extensively, forming a style of integrity, beauty, beauty and communication.
Qing Li Lai's Bird Book is profound and rich in content.