The Song’acha River is the only outflow river from the lake, and is subsequently connected with the Ussuri/Wusuli River and the Amur/Hcilong River system. Furthermore, it plays an important role as a source of drinking water, and irrigation for 20,000 ha of rice paddies in China. Both sides of the lake are important for fisheries, in particular for the white fish (2,000 tons annually).