Even though Meng Chao had trained his muscles and bones, Lei Zongchao would still make him cry and beg for mercy from time to time. "The difficulty of being a 'temporary teaching assistant' is too high. Master Lei, you'd be better off finding someone else!"
However, the contribution on points earned in Battle God Palace were too much and too tempting.
It should be noted that those qualified to follow the Battle God in their cultivation were all determined and talented people. Among them were many heroic citizens who were willing to risk their lives for Dragon City.
Meng Chao guided them through the Battle God's profound and future martial arts. So, there was no need for them to rack their brains and put in so much effort. It was the same as how he had guided his high school classmates or the broken-star superhumans.