Yang Chen still wanted to learn the cultivation method of Sa Qi.
What is Sa Qi?
It is the Qi that is generated when one is angry, this Qi can hurt others and oneself, and for human martial artists, it is something they dread like a tiger.
Not because of anything else, but because Sa Qi is too difficult to control. Once it is not controlled, the one hurt is oneself.
But if one can control it, what one controls is not only Sa Qi, but also anger.
Although Yang Chen seldom gets angry and rarely generates Sa Qi, it doesn't mean he won't in the future. There are too many temptations and troubles in the world. If he is not careful, he may not be able to control himself and may fall into an abyss where he cannot recover. He always has to plan ahead for the future.
Of course, Yang Chen is not without any precautions.
