How much is Dajin Jin's calligraphy and calligraphy works, how to identify them, and where to go?

Dajin Jin, also known as the army of Essien Choro, was born in Beijing in February, 1948. He is a Manchu, a descendant of the Aisin Choro family, the fifteenth son of the Qing Taizu Nurhachi, and the grandson of the twelfth son of the Jade Prince Duo Duo. Among many calligraphy and painting writers, their works are not very outstanding, and the price is even lower than several thousand square meters.