一级理论和二级理论的区别

Sword Valley is some distance away from Sword Mountain Road, and Chai Niu is afraid that the master will stew it. Not only is the speed getting faster and faster, but the habit of being long-winded has also been temporarily changed. Ning Cheng silently deduced the Nirvana body training technique on his teacher Qionghua's back, so naturally he didn't talk much....