Li Xiaren unexpectedly traveled back to the booming years of the 1970s, activated the "two-realm shuttle system", and obtained a portable space and a golden door, allowing him to travel freely between the 1970s and 2025. He used modern materials and knowledge to improve poor lives, gradually accumulated wealth and connections, punished bullies, rescued relatives, opened a restaurant in the county, collected antiques, and made friends with various forces. At the same time, he sold gold antiques, founded a company in 2025, and became an upstart in the business world. Li Xiaren strategized between the two eras, gradually reaching the pinnacle of life that spans time and space.