Photo taken on July 13, 2015 shows an artificial aqueduct canal along a cliff in Badong County of Enshi Tu and Miao Prefecture, central China's Hubei Province. The artificial aqueduct canal, locating at an elevation of about 1,000 meters with an width of two meters, stretches scores of kilometers along a cliff from Qingtaiping Town of Badong County to Changyang County. The project was started construction in 1960s and cost more than 10 years for completion. (Xinhua/Song Wen)