C437 Border Stone.

After saying that, Gong Huayan walked into the secret room. There was a hidden stone door, and it looked like a wall. If one was not familiar with it, they would not be able to detect it, even Chen Feng was no exception.

If Gong Huayan did not push open the stone door, Chen Feng would not know either.

What was inside the stone door? Chen Feng was a little curious.

Gong Huayan laughed: "Come in