"Professor Yan Zhiwu at China University of Geosciences expressed in his recent published results of the united scientific research on the Tenglong cave that, after measured and compared with data of other large caves in China and in the world, the Tenglong cave in Lichuan City of Hubei Province covers an area of 230,000km2 and a volume of 15,750,000m3, being the world largest cave at present."
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