黑龙江是中国东北部与俄罗斯的界江。它的干流从恩和哈达至伯力段长1 890千米为中俄界江,如果再加上其上游额尔古纳河的中俄界河952千米(从海拉尔河口至恩和哈达)和其右岸的支流乌苏里江的中俄界江492千米(从松阿察河河口以下至乌苏里江口),共3 334千米。这样长的界江,不仅是我 Heilongjiang is a boundary river between China’s northeast and Russia. Its main stream stretches 1,890 km long from Nghe Hada to Buri to the boundary between China and Russia. If combined with the 952 km of the Sino-Russian boundary of the upper Ergun River (from the Hailar estuary to Enkh-Hatta) and Its tributary on the right bank of the Ussuri River is 492 kilometers (from the Songacha River estuary to the mouth of the Ussuri River), a total of 3,334 kilometers. This long boundary, not only me