They used to man-maderock walls, the stone houses were locked up in the manner tripping lessons, in the eyes of stone, and is not a ridiculous one stone?
In 1992, four local peasants found large-scale ancient man-made shallow rock caverns in Longyou, Zhejiang.
一个超浅埋大型古地下洞室群于1992年在浙江省龙游县被四个农民发现。
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An ancient man-made near ground surface rock cavern group was found in Longyou County, Zhejiang Province. The 24 large caverns were excavated 2000 years ago.