C182 Only one person is allowed to sail the sea of bitterness

The three of them continued forward, and after an hour, they were forced to stop in front of a stone wall. It was a stone wall that connected the sky and the earth. On it was written: "Endless Sea of Bitterness. Return to the shore!"

It was as if the words were not written, but written. When Lei Nian and the others looked at that line of words