Brief introduction of Zheng Guan

Zheng Guan (793? —853? ), the champion of both civil and military subjects, of unknown origin. In the third year of Tang Muzong Changqing (823), he was the first scholar in Guimao. He is good at calligraphy. According to Li Pan in the 9th year of Yuanhe (8 14), Pei Kun wrote this book, and Ji Tingji was sealed by him.