
Aerial photo taken on June 8, 2017 shows a dam on Lingqu Canal, which is one of the oldest and well-preserved ancient water conservation projects in the world, in Xing'an County, south China's Guangxi Zhuang Autonomous Region. (Xinhua/Lu Bo'an)

Aerial photo taken on June 8, 2017 shows a dam on Lingqu Canal, which is one of the oldest and well-preserved ancient water conservation projects in the world, in Xing'an County, south China's Guangxi Zhuang Autonomous Region. (Xinhua/Lu Bo'an)