Why is Tong Pi called the King of Medicine?

Tong Pi is one of the twenty-eight elders of Liu Xiu, Guangwu Emperor of the Eastern Han Dynasty. He is literate and proficient in medical skills. He often practices medicine for soldiers in the army and the poor wherever he goes. He is known as the king of medicine in Anguo area.

Tong Pi (? ~30 years), the word Wei Jun, Xindu County (now Jizhou District, Hengshui City, Hebei Province). A famous ZTE star in the Eastern Han Dynasty, one of the 28 generals of Yuntai. During Wang Mang's regime, he served as a soldier in he cheng County. Liu Xuan, the first emperor, proclaimed himself emperor and worshipped him as a satrap.

After Wang Lang got up, he held fast to the city and waited for Fu. With Liu Xiu quelling the rebellion in Wang Lang, he became a satrap and was named Hou Wuyi. Liu Xiu acceded to the throne, sealed Ling Shouhou, served as a general, and moved to Taichang, Shaofu and Zuocao as middle schools. In the sixth year of Jianwu (AD 30), he resigned and returned to China, and died at home. In the legends around anguo city, Hebei Province, Tong Pi was honored as the "King of Medicine".