Siheyuan: I Ask You to Repair Machine Tools, but You Build Missiles?

When Yi Ran opened his eyes, he was transformed into a 15-year-old orphan from a welfare home in the 1950s? Living in a Qinman Courtyard despite having a miserable life experience? Fortunately, the [Skilled Craftsman System] was activated! Mechanical drawings and craft skills are at your fingertips! From sewing machines to artillery, from cars to missiles, he single-handedly rewrote industrial history! Acknowledging relatives in the courtyard, but being envied by everyone? The deaf old lady wants to use him as a backup for her retirement? Qin Huairu wants to make him a successor? Xu Damao spread rumors behind his back? Are the Jia family's mother and son acting provocative? Yi Ran slapped everyone in the face with [system drawings] one after another, and the official came directly to pick him up! Build artillery, develop missiles, build new cars... He was promoted all the way, received many medals, and shocked the world! The birds in the courtyard regret their green intestines: Why did you get into trouble with this great god in the first place? !