Wait until the green cicada falls

Description

One night seven years ago, detective Li Jincheng mysteriously disappeared in a village in the city.
Chen Pu is Li Jincheng's best brother. In order to find him, he refused to fall in love, have fun, get promoted, and would not leave the village in the city for seven years.
Later, a new member of the criminal police team where Chen Pu was assigned was Li Jincheng's sister.
——
One day, when I saw the green cicada falling from the branch again, I happily walked behind the praying mantises.
I decided to become a predator.