The Khasansky District lies near the Sino-North Korean border and the Sino-Russian border and included two disputed regions along the Tumen River. According to the agreement, 3 km2 (1 mi2) of territory would be transferred to China, and Chinese ships would gain the right to navigate the Tumen river. The territory transfer would connect a previously enclaved piece of Chinese territory to the rest of China (Fangchuancun). This portion of the agreement stirred up some controversy among some Russian officials from Primorsky Krai, as they felt that direct Chinese access to the Sea of Japan (through the Tumen River) would decrease the economic importance of Vladivostok and Nakhodka. Other arguments protested at potential pollution from Chinese economic development, the possibility of Chinese military vessels navigating the river, and the presence of a Russian cemetery commemorating the Lake Khasan Incident in the area. Finally, in June 1997, the Russian side proposed a resolution which would divide the disputed territory in half. This was accepted by China in September of the same year, and in November, when the border demarcation work was declared finished, 1.6 km2 (0.6 mi2) were transferred to China, and 1.4 km2 (0.5 mi2) were retained by Russia. The Lake Khasan cemetery remained on the Russian side, and the Chinese officials underwent informal agreements to not build a port along the Tumen River.