In the nearly 300-year history of the Qing Dynasty, there are not a few officials who are famous for their incorruptibility, but among them, the famous Dangtui was once praised by Emperor Kangxi as "the first honest official in the world", Yu Chenglong.

Yu Chenglong, whose name is Bei Ai, was born in Yongning, Shanxi (now Lishi, Shanxi). He was born in the forty-fourth year of Wanli in the Ming Dynasty (16 16) and died in the twenty-third year of Kangxi in the Qing Dynasty (1684) in April. He came from an official family, and his ancestors and father were officials of the Ming Dynasty. Influenced by his family, Yu Chenglong is dignified, unsmiling, intelligent and diligent.

Yu Chenglong was an important minister in the Kangxi period of Qing Dynasty. In the 12th year of Chongzhen in Ming Dynasty (1639), he took part in the provincial examination and won the second prize, but his father was old and needed to be taken care of, so he didn't go out to be an official. It was not until the age of 45 that he was elected to the official department of the Qing court by the Ming Dynasty, and he was named as the order of Luocheng County, Liuzhou, Guangxi. Since then, he has served as a magistrate, county magistrate, Taoist priest and other local officials, and has always been a vassal (provincial judge, political envoy) and governor, with political voices everywhere he goes. In particular, he has always been honest and self-disciplined, doing more good deeds and winning the love of the people.