The space of Pipa pearl is Ye Kong's private space. He can do whatever he wants. After entering, he does not appear. Here he is the God, and the laws of heaven are decided by him, let alone invisible.

as soon as you enter the lute bead, ye Kong immediately finds that the space inside has become larger, the area of the ground has expanded from tens of Mu to hundreds of mu, and the black prohibition outside the ground has also moved a lot.

it seems that this lute bead can expand its area with the increase of cultivation, but what is the outer edge of the black forbidden...