
Photo taken on Dec. 5, 2019 shows stalactites in a karst cave at Jizhou District of north China's Tianjin. (Xinhua/Ma Ping)
2019-12-09
Photo taken on Dec. 5, 2019 shows stalactites in a karst cave at Jizhou District of north China's Tianjin. (Xinhua/Ma Ping)
Xinhua