Siheyuan: Transferred from the Military, but a Master Criminal!

He Yufei transmigrates to a courtyard compound and discovers that he has become a soldier who served in the army for over a decade before being demobilized. From the start, he joins the security department of a steel mill as deputy chief of security, earning sixty-eight yuan a month.

But what is this Crime Master System?

As long as he makes sure criminals receive their just punishment, he can gain mastery of all kinds of criminal skills?

Dismemberment, counterfeit money production, tomb robbing, robbery, burglary, firearms manufacturing, gambling, even drug production...

Wait, am I really a police officer?

With him around, the domineering patriarchs in the compound have to keep their tails between their legs. Yi Zhonghai falls from his pedestal as the paragon of morality, and Qin Huairu's image as a virtuous, innocent woman is turned upside down...

In this fiery age, He Yufei takes off with his unreliable System!