There is a barren hillside with the collapsed mark on Mount Longquan.What was it before?And what else dose this deep and serene cave hide?龙泉山上，有过垮塌痕迹的荒山坡，这曾经是什么？深幽的洞里还有什么？
There is a barren hillside with the collapsed mark on Mount Longquan.What was it before?And what else dose this deep and serene cave hide?龙泉山上，有过垮塌痕迹的荒山坡，这曾经是什么？深幽的洞里还有什么？