Li Yi transmigrated into the Tang Dynasty with a lifespan system. He can only increase his lifespan by doing things that benefit the development of Tang society. His lifespan is now measured in hours, and he encounters Emperor Li Longji, who is hiding his identity from him. The story begins here. Li Yi: As long as it increases my lifespan, I have all the technology. Currently, I guarantee more than 10,000 words of updates per day. As for the quality, you'll know after reading it.