For Li Mu, the most useful function of the internal qi was that it could serve as the lubricant in his practice and help him make more breakthroughs in studying the Zhenwu Boxing. Before, no matter how perfect he did on the first three styles of the Zhenwu Boxing, he was always seized by a pang of agony as if his meridians and bones were broken if he proceeded to the fourth style.

Li Mu assumed it might have something to do with the lack of internal qi in his body. ...