黑人下面又粗又硬死去活来

When Ning Cheng actually stood at the bottom of the lake, he was disappointed. He didn't see the ten-foot-wide boulder mentioned on the map. There was only some sand and gravel at the bottom of the lake. The map said that you can feel the Immortal Mansion only by standing on the boulder. How could he feel if he didn't even see the boulder?...