Teach the Apprentice System to Waste

Yun Feiyang travels to another world and awakens the system of teaching and disabling apprentices. As long as he teaches and disables apprentices, he can get rewards. However, thousands of years have passed, and Yun Feiyang, who has sent away another ascended person, looked at himself when he was still in the Qi refining stage, and couldn't help but sigh - why is it so difficult to teach a disciple to waste!