He was in semi-destroyed chamber. There was a hole in the roof enough to fit him. He probably entered this chamber through that.
Seeing the glass-like surface and his reflection flickering on top while holding a bead, Haoran searched for something to climb onto and found a three meter shelf.
Reaching the edge, he wiped the beads of water on his hand and waited for it to dry, extended it and touched the thing looking like a glass.
His hand passed through felt the heavy pressure of water and when he got retrieved it, it was wet.
A barrier.
Haoran thought. Confirming his suspicions, he jumped down and landed on the sandy ground.
There were orange spongy plants scattered around that one he should have touch seconds ago, red ferns, large rocks, and round objects with cracks.
[Memory Pearl (Destroyed)]
The size of the room was small as a 40 square feet garage.
[Left Main Wing of the Treasury]
Haoran received another prompt.