China–Mongolia relations

Diplomatic relations between People's Republic of China and Mongolia were formally established in October 1949. During the Cold War, relations were determined by the relations between China and the Soviet Union, Mongolia's other neighbour and main ally until early 1990. With the rapprochement between the USSR and China in the late 1980s, Chinese-Mongolian relations also began to improve. Since the 1990s, China has become Mongolia's biggest trading partner, and a number of Chinese businesses operate in Mongolia.