Siheyuan: Starting to work in the security department

Modern Niu Pingan traveled back to the 60s, inherited his uncle's job and joined the security department, and lived in the legendary Qinman Siheyuan. As a security guard, the neighbors didn't dare to provoke him. Niu Pingan watched coldly as Sha Zhu fell into the gentle trap step by step... He himself lived a leisurely life relying on the supplies given by the system...