I think PX is the little black dot at the bottom, entering the picture.

我认为那个底部的小黑点是行星x，正进入图画中。

youdao

By entering EOS or Helios tower, you are now ready to go to the bottom.

玩具塔或者赫利·奥斯塔，你现在要准备好去底部。

youdao

By entering EOS or Helios tower, you are now ready to go to the bottom.

玩具塔或者赫利·奥斯塔，你现在要准备好去底部。

youdao