图们江(上游为中朝界河,下游为俄朝界河)开发是发展东北亚区域合作的关键所在,但历时20年之久却难以打开局面,一个重要原因就是在地理环境方面存在致命缺陷,即图们江没有通往日本海的通道。这是日本侵华战争的恶果和历史遗留问题。中国本是日本海沿岸的主要国家之一1689年,中俄签署第一个边界条约——《尼布楚条约》。据此,黑龙江、乌苏里江都是中国内河,两河流域以 The development of the Tumen River (the upper reaches of the Sino-Korean border river and the lower reaches of the Russian-Soviet border river) is the key to the development of the Northeast Asian regional cooperation. However, it took a long time for 20 years to open up the situation. An important reason is that there are fatal flaws in the geographical environment, That Tumen River has no access to the Sea of ​​Japan. This is the crux of the Japanese invasion of China and the issues left over by history. China This is one of the Main Countries along the Sea of ​​Japan In 1689, China and Russia signed the first boundary treaty, the “Treaty of Nibuchu.” Accordingly, Heilongjiang and Wusuli rivers are all inland rivers in China and the two rivers