Ministry of Water Resources: By 2035, the Danjiangkou reservoir area and upstream stock problems will be fully solved. In the nine years since the first phase of the middle line of the South-to-North Water Diversion Project was officially opened, a total of more than 11.9 billion cubic meters of water has been transferred to the north. It has become the main water source for 605 large and medium-sized cities in Beijing, Tianjin, Hebei and Henan.