一级理论和二级理论的区别

Ye Feng gently twisted his neck and said proudly: Mu Qing, don't think that just because you kill Aotian, you are truly invincible at the golden elixir stage. You must know that there are people outside the world, and there is a sky outside the world! I have never regarded Aotian as an opponent because he is not strong enough!...