Siheyuan: Outlaw Without Limits, From the Start I Bring the Birds to Justice

Gu Yan, a big shot in the underworld of the 21st century, dies after being shot in his modern life.

When he wakes up, he has transmigrated to a courtyard compound and become a top student at the University of Political Science and Law, from a martyr's family.

[Host detected entering courtyard compound. Lawful Vermin-Disciplining System activating...]

Why should a big shot from the future need to use the law to deal with vermin? You're making things difficult for me!

No damn way a dog would do this. Well, if a dog won't do it, I will.

Seeing how generous the System's rewards are, Gu Yan resolutely, if reluctantly, sets out on the path of disciplining vermin by law…