sentences:  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.North Korean refugees are a delicate issue between the two governments.In 2005, South Korean charity groups received from the Mongolian government an allocation of 1.3 square kilometres of land at an unspecified location 40 kilometres outside of Ulan Bator to establish a refugee camp.