一级理论和二级理论的区别

I know you got at least nine nine-color mirage stones. I don’t need more. As long as you can give me one nine-color mirage stone, I can give you four six-color mirage stones. At the same time, the rest of the conditions are up to you. Liang Kexin finished speaking very straightforwardly and stared at Ning Cheng. Waiting for Ning Cheng's answer....