Reference Source：中国红色旅游网（有改动） 

    Located at the borders of China, Russia and Mongolia, northeast of Inner Mongolia Autonomous Region, Manzhouli City is the largest inland port in China. In 1920s a secret transportation station was set up by the CPC, opening up a red communication path from Manzhouli to Soviet Union.
     As a secret line of communication existing for the longest time in the history of China’s revolution, it has witnessed the glorious process of how members of CPC sought truth of revolution, saved the Chinese nation and built new China. Some of the early leaders of CPC such as Li Dazhao, Cheng Duxiu, Liu Shaoqi and Zhou Enlai just took this road to go to Soviet Union to learn Marxism and steered the Chinese revolution towards victory. And some important historical events are related to it, such as, Chairman Mao’s visit of the Soviet Union.
    The development of this communication line has experienced a lot ups and downs, during which many revolutionary martyrs, early establishers of CPC and leaders of the state were involved. Bearing large number of moving historical events, it is well worth appreciating and can be functioned as the place where you can learn a lot. It made great contribution to the spread of Marxism-Leninism in China, the foundation and growing of CPC as well as the victory of the anti-Japanese war.