Qian Ziyou, 79, poses for a picture with a photo showing a dam on Longhekou Reservoir in Shucheng County, east China's Anhui province, March 30, 2015. Qian Ziyou, a graduate of Shucheng Water Conservancy College, was in charge of measurement work in building Longhekou Reservoir. Longhekou Reservoir, which has a storage capacity of 903 million cubic meters, was built on the Hangbu River in 1958 under the joint efforts of tens of thousands residents of Shucheng County. The reservoir, as a headwork of the Pishihang irrigation area, still plays a vital role in preventing flood, irrigation and urban water supply. (Photo: Xinhua/Lyu Wunong)
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