You Built a Space Fortress?!

Zhou Yu gets a second chance in a parallel world—inheriting a bankrupt factory on the brink of collapse. Armed with knowledge from his past life, he reverse-engineers cutting-edge tech in smartphones, electric vehicles, and entertainment, transforming his struggling workshop into a global industrial empire. But when his ambitions soar beyond Earth's atmosphere, the world asks in disbelief: how did a private company end up constructing a literal space fortress?