Siheyuan: I, He Yuzhu, Am the True Demon King

I transmigrated to a Siheyuan and became the God of War, He Yuzhu. With the help of the sign-in System and my own tireless efforts, life just keeps getting better. What, Qin Huairu wants to leech off me? Two punches will put a stop to that. Bang Geng is the Siheyuan's legendary thief? I'll send him straight to juvenile detention to learn his lesson. The First Uncle wants someone to look after him in his old age? No problem. Transfer your house to me first. Otherwise, go ask Qin Huairu. Everyone in this Siheyuan is garbage. I'm the only true big bad here, He Yuzhu.