Just After I Came Down to Earth, My Identity as a God Was Exposed by Fatty.

Yan Ning was originally the door god of the divine realm, responsible for guarding the demon realm. Due to a momentary distraction, the ancient demon god escaped from the demonic realm. He chased the devil and came to the earth, and found that this was the world he had visited when he was training in the world of mortals. Because of the barrier of heaven, he could not come in his true body. He could only come to this world with his soul occupying the body of his disciple's descendants. This descendant had a last wish that he had not fulfilled, so he fulfilled his wish. He has had many apprentices in this world. But most of them were taught casually, and some names have been forgotten. And it has been a thousand years since the last arrival. I'm afraid only a few can survive. He remembered a disciple he had taken on, named Sun Wukong! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.