Since 1911
Upon Mongolia's declaration of independence, many Chinese became victims of atrocities, particularly in Khovd. However, after 1912, Chinese businesses were able to continue their operations, including collection of debts, largely unimpeded. It was only the establishment of communism that meant an end to Chinese trade in Mongolia. Ever-increasing obstacles to commerce were created, and the closure of the border to China for imports in 1928 meant an end for Chinese enterprise in the country.
With the People's Republic of China development aid projects of the 1950s, many Han Chinese entered Mongolia, beginning in 1955. By 1961, they had reached a number of 20,000. However, most of them left the country when relations between Mongolia and China soured in the early 1960s. In the early 1980s, Ulan Bator was reported to have a small Chinese community, which published a Chinese-language newspaper and which looked to the Chinese embassy there for moral support. However, in 1983, Mongolia systematically began expelling some of the remaining 7,000 Chinese contract workers in Mongolia to China. At the same time, ethnic Chinese who had become naturalized citizens were reported to be unaffected. Because the presence and the status of Chinese residents in Mongolia were politically sensitive subjects, Mongolian sources usually avoided mentioning the Chinese at all.
After the introduction of democracy, another wave of Chinese immigrants has entered the country. Many of the migrants work in the construction sector, while others run small or medium enterprises. Negative sentiment against Chinese migrants remains; China is seen as a potential threat to Mongolia's security and cultural identity. However, not all recent immigrants from China are ethnic Chinese; in particular, there is a number of Inner Mongolians.
Read more about this topic: Ethnic Chinese In Mongolia