一级理论和二级理论的区别

The violent star energy exploded and rushed to Ning Cheng's chest, directly blowing out a mouthful of blood from Ning Cheng. At this time, if Ning Cheng retreated, he would be less injured. Qionghua was right in front, how could he retreat. As Tianyun flapped his wings, he advanced instead of retreating, which only made him even more injured....