Jiang Yajun helps her grandmother pump water, while her brother helps his grandfather straighten up his fishing net at home in Jiangwu village, Wuhe county, East China's Anhui province, July 21, 2011.[Photo/Xinhua] 

Jiang Meng and Jiang Yajun talk with their parents by phone at the care center in Mituo town of Wuhe county, East China's Anhui province, where free calling service is provided for left-behind children, July 21, 2011.[Photo/Xinhua]