I, the Strongest Demon, Have Regained My Youth?!

Story:

A brief description of the manhua I, the Strongest Demon, Have Regained My Youth?! Having unified the Celestial Empire forever and ever, I, the demon king Xin Sheng, went to the demon world in search of the highest power in order to maintain my reign. Thousands of years later, Xin Sheng actually became stronger, but turned into a child. During this time, the world also changed and became completely different from the one that he remembered. To regain the title of the strongest demon king, even in the body of a child, he will have to rebuild the empire created in the past and restore its former greatness.