 However, in recent years, immigration from mainland China has increased; 696,861 persons of PRC nationality have immigrated to South Korea, making them 55.1% of the total 1,139,283 foreign citizens living in South Korea.Among them are 488,100 of Korean descent (70% of PRC citizens in South Korea, and 40% of the total number of foreign citizens), and 208,761 of other ethnicities.Most of these new residents live in Seoul and its surroundings.