Photo taken on Aug. 3, 2022 shows the Xinglong karst cave in Xinglong County, north China's Hebei Province. (Xinhua/Luo Xuefeng)
Photo taken on Aug. 3, 2022 shows the Xinglong karst cave in Xinglong County, north China's Hebei Province. (Xinhua/Luo Xuefeng)
Photo taken on Aug. 3, 2022 shows the Xinglong karst cave in Xinglong County, north China's Hebei Province. (Xinhua/Luo Xuefeng)
Photo taken on Aug. 3, 2022 shows the Xinglong karst cave in Xinglong County, north China's Hebei Province. (Xinhua/Luo Xuefeng)
Photo taken on Aug. 3, 2022 shows the Xinglong karst cave in Xinglong County, north China's Hebei Province. (Xinhua/Luo Xuefeng)
Photo taken on Aug. 3, 2022 shows the Xinglong karst cave in Xinglong County, north China's Hebei Province. (Xinhua/Luo Xuefeng)
Photo taken on Aug. 3, 2022 shows the Xinglong karst cave in Xinglong County, north China's Hebei Province. (Xinhua/Luo Xuefeng)
Tourists visit the Xinglong karst cave in Xinglong County, north China's Hebei Province, Aug. 3, 2022. (Xinhua/Luo Xuefeng)
Tourists visit the Xinglong karst cave in Xinglong County, north China's Hebei Province, Aug. 3, 2022. (Xinhua/Luo Xuefeng)