I Am a Teacher at Gaowu Academy

The male protagonist was reborn in the world of high-level martial arts. He thought that he would have a system by his side and have extraordinary talents. Unexpectedly, he had nothing. After graduating from the intermediate college, he was sold by the trade union to the front line to fight against the demons. Later, the male protagonist managed to survive and found himself in the demon land. Jie Gou lived for 20 years and returned as a middle-aged uncle with mysterious and powerful strength. Now he finally arrived in the human world. He wanted to live a carefree life by relying on his own skills. Unexpectedly, the demonic forces had already penetrated into the school...