[4] From 1960 to the mid-1980s, the Sino-Soviet split – in which Mongolia adopted a consistently pro-Soviet stance, whereas the DPRK's standpoint was usually closer to the Chinese position than to the Soviet one – considerably hindered Mongolian-North Korean cooperation.
The Trans-Siberian Railway, an essential link in the potential continuous rail transit route from South Korea to Europe, passes through Mongolia; North Korean economic liberalisation which allowed South Korean shipping to pass through its borders would remove the major stumbling block to such a route, providing economic benefits for Mongolia.
One scholar estimated that 500 North Korean refugees enter Mongolia each month, along with some legal migrant labourers who come under an inter-governmental agreement to work in light industry and infrastructure projects.
[14] In 2013, the Mongolian President Tsakhiagiin Elbegdorj visited North Korea, and the two countries expanded economic ties, particularly with regard to oil refining.
[15][16] In October 2018, North Korean Chairman Kim Jong Un received an official invitation to pay a visit to Mongolia by President Khaltmaagiin Battulga.