黑河是中俄两国边境的重要口岸,它具有悠久的贸易历史。1858年瑷珲条约签订后,黑龙江由内河变成了界河,两国边境贸易得到了迅速发展,黑河成了中俄两国贸易中心。大量俄、日、美、德、法等国客商进驻黑河,黑河被称为“万国商埠”,年进出口贸易额达768万两白银。新中国成立后,黑? Heihe is an important port of China-Russia border and has a long history of trade. After the signing of the Treaty of Obsidianism in 1858, Heilongjiang became a boundary river from inland river and the border trade between the two countries developed rapidly. Heihe became the trade center between China and Russia. A large number of merchants from Russia, Japan, the United States, Germany, France and other countries stationed in Heihe. Heihe was referred to as “the merchant port of all nations.” Its annual volume of import and export trade reached 7,680,000 taels of silver and silver. After the founding of new China, black?