Siheyuan: I Am Invincible After Getting the Sign-In System

College student He Yuzhu accidentally came to the world of Qinman Siheyuan. And got a sign-in system and an independent personal space. The canteen of the steel rolling mill, the workshop, the room of the deaf old lady... Each time you unlock a new scene, you will gain a new ability. God-level cooking skills, full-level fitter skills, antique appraisal skills... He Yuzhu, who knew his destiny, decided to change everything. No longer will you let others fool you. Uncle: Why doesn't this silly column listen to me? Did he discover something? Qin Huairu: Why does Silhu suddenly look like a different person? Does he really not care about us? Xu Damao: What's going on with this guy? Why are you getting smarter? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.