Aerial photo taken on April 16, 2018 shows the excavation site of an underwater treasure ruins to the south of the city of Chengdu, southwest China's Sichuan Province. Chinese archaeologists have recovered more than 12,000 relics during the latest round of excavation at the treasure ruins, according to Sichuan Provincial Cultural Relics and Archaeology Research Institute. It is believed that in 1646, the peasant uprising leader Zhang Xianzhong was defeated in the area by Ming Dynasty troops while attempting to transfer his treasure to the south. About 1,000 boats loaded with money and valuables are said to have sunk during the skirmish. (Xinhua/Liu Kun)