Xingkai is Manchu. Xingkai Lake was originally a Chinese inland lake. After the signing of the Sino-Russian Treaty of Beijing in 1860, it became a Sino-Russian border lake. It is located in the southeast of Heilongjiang Province, in Mishan City, Heilongjiang Province. It is 35 kilometers away from Mishan City. The northern third of its area belongs to China, and the southern part belongs to Russia.