Baby In A Crib?

Shirong did a little mental Tetris and figured out that if he floated in the air horizontally, he would be able to enter the hole easily. 

And thus that's what he did. He floated, turned horizontally, and entered the hole which was slowly closing. When he fully passed through it, Lin Wu intentionally stopped his control on his spirit Qi and let the barrier close.

~Zing~

The barrier flickered due to being restored, and Shirong flinched.

"It closed back?… Never mind, I should be able to open it again later." Shirong said before taking a look around.

He walked about ten steps ahead before...

~DENG~

~Thud~

He hit an invisible barrier.

"Huh? Another barrier?" Shirong said as used his spirit sense to check the barrier.

"Heavens! This is no simple barrier!" Shirong exclaimed.