Siheyuan: From the Start, I Fuse with a Flyswatter

Cao Weiguo transmigrates to a courtyard compound in 1962 and obtains a god-tier fusion System that lets him combine items to multiply their attributes tenfold for his own use. From the start, he fuses a flyswatter and beats Jia Dongxu soundly, then fuses Old Jia's spirit tablet and scares Jia Zhangshi to tears. Next, he joins the steel mill as a technician, putting the courtyard scoundrels in their place while advancing the nation's technology. His personal life and career both flourish. The whole courtyard is stunned, and so are countries around the world.