C841 What Is That?

There was no response after three light taps. Only the white jade door emitted a layer of mist-like fluorescent light; it was ethereal and graceful.

"I wonder if the owner of the cave is here?" Lin Yu greets you. " Lin Yu tidied up his clothes and said loudly outside of the cave. Then, he knocked on the door of the cave.

However, the door had yet to open.

However