After Jiang Muyan graduated from the police academy, he was assigned to the Third Criminal Investigation Team of the Municipal Bureau, where he met his good friend Jia Ranran, team leader Chen Feng, and teammates Li Ming and Zhang Yi.
The five people worked together to solve cases involving traffic, women's self-rescue, historical warnings, human selfishness, school violence, etc. That examined the multi-faceted nature of human nature.
Good-looking and good-looking