System Dad, I'll Kill You If You Don't Want to Be a Fat Dragon Detective.

Zhang Tianshun felt like the world was spinning, and in the blink of an eye, he was transported to a parallel world. Before he could figure out the situation, the system's cold threat rang in his mind: he must become a policeman, otherwise he would suffer. This made Zhang Tianshun very worried. What he really wanted to do was become a miracle doctor, cure diseases and save people. In order to be fired, he embarked on a road of hilarious police officers who made no big mistakes but kept making small mistakes. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.