Imperial henchmen? Never been struck by the sword of the Six Doors (a secret police agency).

Also known as: *Six Doors, Confiscating and Exterminating Families* [Transmigration + Decisive and Ruthless + Single/No Female Lead] My name is Li Junsu, and I paid the price for my arrogance. I was reborn, but why in a fantasy world, and as the illegitimate son born to a maid who climbed into her bed? But so what? I joined the Six Doors, step by step rising to the position of Chief Constable. On this path, blood is my veins, and bones are my steps. Confiscating and exterminating families, my fearsome reputation can silence even the most wicked children. The martial world should be quiet because of my name, Li Junsu. Court lackeys? They've never faced the Six Doors' blade. My name is Li Junsu, the "Su" in "Su-sha" (meaning ruthless and murderous). If I say I'll exterminate your entire family, I will exterminate your entire family. ...