From Mechanic to Sky Reaver

Zhao Yuan was originally a pioneer in the field of science, but he was deprived of his "human" identity because he mastered too advanced time travel technology. He left the world he once lived in and traveled to the past, but lost his memory. The first person he met turned out to be a young man who looked exactly like him, also named Zhao Yuan. The young Zhao Yuan is the number one mechanical genius of the Zhao family. He has been dependent on his sister Zhao Wanyue since childhood. However, Zhao Wanyue disappeared a month ago. In order to save the young Zhao Yuan, the time traveler Zhao Yuan changed his name to Zhao Bing and embarked on a journey to save Zhao Wanyue with Zhao Yuan.