 Complete the following phrase:  Lake Khasan or Lake Hassan ;  is a small lake in Khasansky District, Primorsky Krai of Russia, located southeast of Posyet Bay, on the border with North Korea and China, southwest of Vladivostok. It has a surface area of . The Tanbogatyi River flows from the lake. The lake, described as the tight corner where the territories of Korea, Manchuria, and Russia meet, was the site of the 