Koreans immigrated to China.

Registration of foreign-related marriages:

Article 4 of the Marriage Registration Ordinance stipulates that if a China citizen marries a foreigner in the mainland of China, and a mainland resident marries a Hong Kong resident, a Macao resident, a Taiwan Province resident or an overseas Chinese in the mainland of China, both men and women shall * * * register their marriage with the foreign-related marriage registration authority where the mainland resident's permanent residence is located.

Article 5 stipulates that mainland residents shall submit the following documents and supporting materials when handling marriage registration:

(1) My household registration book and ID card;

(2) A signed statement that I have no spouse and no direct blood relationship with the other party and collateral blood relationship within three generations.

Foreigners who register for marriage shall present the following documents and supporting materials:

(a) my valid passport or other valid international travel documents;

(2) A certificate issued by the notary office or competent authority of the host country and certified by the people of China and the embassy (consulate) of China in that country or the embassy (consulate) of China in that country that I have no spouse, or a certificate issued by the embassy (consulate) of China in that country that I have no spouse.