This discovery immediately made Zhou Chun give up the idea of escape and instead he began to explore this completely new underground ice cave.
The underground ice cave passage was likely created by melting ice water, with frozen soil mixed with gravel and stone chunks beneath, and a hard layer of blue ice above. The height between the ceiling and the floor was not constant, but the difference was not too great.
The temperature inside was very low as well, but since no new vapour was entering, the place couldn't form more ice to block the passage.
Zhou Chun walked along the passage, and after about two hours, the path ahead suddenly came to an end.
At this point, he seemed to be on the edge of a cliff, facing a thickness of solid ice that was of unknown depth.
If the underground ice cave was indeed formed by the rush of melting ice water, then that water must have poured down below the cliff at this spot and then solidified into ice.
