Fortune and calamity comes together

After an unknown amount of time, Yan Liqiang slowly woke up!

When he opened his eyes, what appeared before him was strands of crystal that came down from the cave ceiling. They were like arrows that pointed at him as though they would shoot down at any time. Around his body was a soft flesh, he seemed to be laying on that huge water leech.

Yan Liqiang was shocked and instinctively jumped up from the ground.

This jump shocked Yan Liqiang again because he found that with this jump, he flew up from the ground and went 20 meters high in the air.

"oh, shit…" Yan Liqiang screamed and waved his hand in the air. But Yan Liqiang did practice martial arts and found his balance after a few rolls before steadily landing on the ground.

"crack…" when Yan Liqiang landed, he used force on the sturdy ground and stood at two 15cm deep footprints. The back of his feet sunk into the rock.

Was the ground made of sand?