一级理论和二级理论的区别

The middle-aged man thought that Ning Cheng couldn't get much money out of it, but he didn't expect that he would get two hundred green coins just for asking, and he suddenly felt happy. He put away the two hundred green coins without hesitation, and said very carefully that the trial in the Time Wasteland ended more than a month ago, and the emperor selected the top ten to enter the Zhongtian Starry Sky to participate in the finals. The top ten are...