He is Bai Yutang's sworn brother. Later, he was admitted and became a big official. He led the chivalrous men with three chivalrous men and five righteous men to break the bronze net array of Xiangyang King and made great achievements. But in the process, Bai Yutang died.

Yan Yan San's story: He went to Beijing to take the exam with Mo Yu, a bookboy, and lived in Liu Jinchan's house. He and Liu Jinchan were childhood friends, and Feng Junheng, a thousand officials, wanted Liu Jinchan. He went to Liu Jiali to kill the servant girl, and was framed and investigated for three years in prison. Finally, Bao Gong was rehabilitated and strictly investigated, and he was acquitted.

Extended data:

Strictly investigate the characters in Three Heroes and Five Righteousnesses and Bao Qingtian;

In "Three Heroes and Five Righteousnesses", Yan Yan's father is an honest and clean county yin. Influenced by his father, he became a disciple of Bao Zheng. After being among the best in yancha No.3 High School, he worked under Bao Zheng. He has rich knowledge and noble moral quality. It is these two things that made Yan Cha San recognized by Bai Yutang, and they became sworn brothers.

In the second half of the original work, it is described that Yan Cha-san, with the help of Bai Yutang and other Jianghu chivalrous men, broke through the copper net array of Xiangyang Wang Xiaochong Building, and Yan Cha-san made great contributions. However, in the process of breaking Xiao Lou's copper net array, Bai Yutang died, while Yan Sansan did not.

In the TV series "Bao Qingtian", Yan Yan San became a big official, but it was not as important as in the original. Bao Qingtian focuses on three characters: Bao Zheng, Gongsun Ce and Zhan Zhao, and there are not many plots to be scrutinized.

Baidu Encyclopedia-Strict Investigation III