evidence: Located on the left bank of Heilongjiang, Jiangdong Sixty-four Tun is a collective name for a group of villages. It was originally under the jurisdiction of the Heilongjiang General. At that time, the Outer Xing'an Mountains were under the jurisdiction of China, and Heilongjiang was an inland river in China. At the end of the Qing Dynasty, especially after Xianfeng, with the signing of the Sino-Russian Treaty of Aigun, the Treaty of Tianjin, the Treaty of Beijing, etc., China's funerals covered a large area. The Heilongjiang and Ussuri Rivers became the Sino-Russian boundary rivers. However, Hailanpao on the left bank of Heilongjiang and Liusitun in Jiangdong are still Chinese territory. The specific area is from the mouth of Jingqili River in the north, to Huoer Molejintun in the south, to the left bank of Heilongjiang River in the west, and bounded by the Jingqili River to the Bolegerqin River in the east, with a width of more than 90 miles and a stretch of 180 miles. ten miles. A total of sixty-four villages.