My Fake Brother-In-Law Is the Prince

Traveling through the 16th year of Zhenguan in the Tang Dynasty, he was imprisoned in a cellar as a substitute because he looked like the prince's wife's brother. Counterattack the opponent at the beginning, pretend to be someone else, and steal the opponent's Jinwuwei position and house... I don't understand what it means to serve as an official and to benefit others. All I know is that the money is mine and you can't touch it, and the people are mine and you can't touch them. Otherwise, I'll let you know how destructive a little willfulness of power can be.