How Could I, a Poor Scholar, Have Any Evil Intentions?

Jiao travels back to the Zhengde period of the Ming Dynasty. His wife died early and the real estate was confiscated. But as an actuary in his previous life, he didn't want to just do nothing. No system? It doesn't matter! No cheat code? It doesn't matter. Then I will use this small copper plate to let Daming appreciate some of the coquettish moves that a time traveler should have.