Tourists visit a Karst cave in Jiuxiang of Yiliang County, some 90 kilometers away from Kunming, capital of southwest China's Yunnan Province, Aug. 12, 2013. Jiuxiang is famous for its Karst cave landscape. (Xinhua/He Junchang) 

 Tourists visit the Jiuxiang scenic spot in Yiliang County, some 90 kilometers away from Kunming, capital of southwest China's Yunnan Province, Aug. 12, 2013. Jiuxiang is famous for its Karst cave landscape. (Xinhua/He Junchang)

 Photo taken on Aug. 12, 2013 shows the scenery of Karst caves in Jiuxiang of Yiliang County, some 90 kilometers away from Kunming, capital of southwest China's Yunnan Province. Jiuxiang is famous for its Karst cave landscape. (Xinhua/He Junchang)

Tourists visit a Karst cave in Jiuxiang of Yiliang County, some 90 kilometers away from Kunming, capital of southwest China's Yunnan Province, Aug. 12, 2013. Jiuxiang is famous for its Karst cave landscape. (Xinhua/He Junchang)

Photo taken on Aug. 12, 2013 shows the scenery of Karst caves in Jiuxiang of Yiliang County, some 90 kilometers away from Kunming, capital of southwest China's Yunnan Province. Jiuxiang is famous for its Karst cave landscape. (Xinhua/He Junchang)

Photo taken on Aug. 12, 2013 shows the scenery of Karst caves in Jiuxiang of Yiliang County, some 90 kilometers away from Kunming, capital of southwest China's Yunnan Province. Jiuxiang is famous for its Karst cave landscape. (Xinhua/He Junchang)

Tourists visit the Jiuxiang scenic spot in Yiliang County, some 90 kilometers away from Kunming, capital of southwest China's Yunnan Province, Aug. 12, 2013. Jiuxiang is famous for its Karst cave landscape. (Xinhua/He Junchang)

Photo taken on Aug. 12, 2013 shows the scenery of Karst caves in Jiuxiang of Yiliang County, some 90 kilometers away from Kunming, capital of southwest China's Yunnan Province. Jiuxiang is famous for its Karst cave landscape. (Xinhua/He Junchang)