in the early 1950 s, at a time when new China was waiting for prosperity, the cooperative relations with China's northern neighbor, the Soviet Union, gradually deepened. In this period of idealistic years, "China's flow to the Soviet Union" is not only a simple route of goods circulation, but also carries the important mission of national reconstruction, ideological identity and industrial infrastructure construction. It has witnessed the process of building a new order of resource sharing within the socialist camp, and has also become one of the key promoters in the process of my country's modernization.

At that time, it relied on the main artery that traversed east and west-Longhai Railway and the land passage from northeast to Manzhouli to form the main transportation framework. These crisscross transportation networks connect the machinery production bases in Taiyuan, Shenyang and other places in North China, and continuously transport coal equipment, metal products and even food supplies to the hinterland of the Soviet Union through border ports. Even at the height of the Cold War, when the global situation was tense and antagonistic, this invisible but indomitable lifeline has always maintained the most basic and pragmatic spirit of cooperation between the two world powers.

After the mid-1960s, with the deterioration of the relationship between the two parties, the cross-border supply chain, which had been running smoothly for many years, began to fluctuate or even interrupt. At the same time, the Chinese government has also begun to explore ways to get rid of the situation of relying on a single source of imports, and actively expand economic and trade links with other friendly countries while independently developing mineral energy at home. Nevertheless, the basic framework built in the early years still laid valuable lessons for the broader and diversified opening pattern in the later reform and opening up period.

Looking back at the changes in the past 70 years, although "China's flow to the Soviet Union" no longer has the decisive position it once did, the spiritual core that it represents, which integrates resources across geographical barriers to meet complex challenges, is still worth learning from. Especially when the principle of win-win cooperation is advocated in the process of globalization in the new era, the "Belt and Road" initiative is a concrete manifestation of inheriting and carrying forward such traditional wisdom. Through the research and reflection on that little-known but extremely important communication history, it will help us to better grasp the future development direction and make more wise and reasonable choices in the face of the new wave of scientific and technological revolution.