Staff members work in a control room of water diversion in north China's Tianjin Municipality, Aug. 18, 2017. Since the operation of the middle line of China's south-to-north water diversion project on December 12, 2014, more than 2 billion cubic meters of water has been supplied to Tianjin. (Xinhua/Lu Peng)

　　Staff members work in a control room of water diversion in north China's Tianjin Municipality, Aug. 18, 2017. Since the operation of the middle line of China's south-to-north water diversion project on December 12, 2014, more than 2 billion cubic meters of water has been supplied to Tianjin. (Xinhua/Lu Peng)

         Staff members check the devices at a water diversion well in north China's Tianjin Municipality, Aug. 18, 2017. Since the operation of the middle line of China's south-to-north water diversion project on December 12, 2014, more than 2 billion cubic meters of water has been supplied to Tianjin. (Xinhua/Lu Peng)

　　Staff members check the water quality at a water monitoring center in north China's Tianjin Municipality, Aug. 18, 2017. Since the operation of the middle line of China's south-to-north water diversion project on December 12, 2014, more than 2 billion cubic meters of water has been supplied to Tianjin. (Xinhua/Lu Peng)

　　Staff members catch floating objects in the water in north China's Tianjin Municipality, Aug. 18, 2017. Since the operation of the middle line of China's south-to-north water diversion project on December 12, 2014, more than 2 billion cubic meters of water has been supplied to Tianjin. (Xinhua/Lu Peng)

　　Source: Xinhua News