Tang Dynasty: the Holy Prince, the Dragon Rules the World

Li Chengqian, a useless engineering man, was about to die in a car accident and traveled through the early Tang Dynasty to become the useless prince Li Chengqian with the same name. With the help of the system, reform the government, wipe out barbarians, and expand territory. It's just that this system is a bit unreliable in many cases. "Hey, system, why does the achievement "Basic God" exist in Mao's achievements? I'm a pure man, okay? My dear, the reward is so high. This is forcing me to become a gay."