Yan Qingyu, Chen Feng's teacher, was injured while saving Ran, so she couldn't continue practicing. After that, Yan Qingyu faked her death and escaped. Chen Feng has no choice at all, because he has no background and he is still very young. Even if he is one of the best, it is easy to be possessed, so Yan Qingyu moved his mind, even if Chen Feng is his disciple.
The ending of Yan Qingyu:
Yan Qingyu is the illegitimate child of the Yan family in Daning City, Chen Feng's master and a former wizard.
At that time, Gan Yuan was a genius, but later he was ambushed and couldn't practice, so he was regarded as a waste. Take Chen Feng as your own. Later, in the process of treasure hunting, he was seriously injured by Tianhe strong men and died. Under the blessing of Chen Feng's five-year "Wodoro Ye Zhen Sutra", his soul was nourished in Baoding, and then he woke up to take Chen Feng away and was killed by Chen Feng.