Registering a marriage will expose a second marriage. According to the Marriage Registration Regulations, if a person wants to register for marriage again after divorce, they need to provide relevant materials such as a divorce certificate or a court divorce judgment. The marriage registration staff will review the materials and approve the issuance of the marriage certificate if they meet the requirements.
Relevant regulations on marriage registration
1. Mainland residents who apply for marriage registration shall provide the following documents and proof materials:
（1） My household registration book and ID card;
（2） I hereby declare that I have no spouse and no direct blood relationship or collateral blood relationship within three generations with the other party.
2. Hong Kong residents, Macau residents, and Taiwan residents who apply for marriage registration shall provide the following documents and proof materials:
（1） My valid pass and ID card;
（2） A statement notarized by a notary public in the place of residence stating that the individual has no spouse and no direct blood relationship or collateral blood relationship within three generations with the other party.
3. Overseas Chinese who apply for marriage registration shall provide the following documents and proof materials:
（1） My valid passport;
（2） A certificate issued by a notary public or authorized agency in the country of residence, authenticated by the embassy or consulate of the People's Republic of China in that country, stating that the individual has no spouse and no direct blood relationship or collateral blood relationship within three generations with the other party, or a certificate issued by the embassy or consulate of the People's Republic of China in that country stating that the individual has no spouse and no direct blood relationship or collateral blood relationship within three generations with the other party.
4. Foreigners who apply for marriage registration shall present the following certificates and supporting materials:
（1） My valid passport or other valid international travel documents;
（2） A certificate issued by a notary public or authorized agency in the country of residence, authenticated by the Chinese embassy or consulate in that country, or authenticated by the Chinese embassy or consulate in China, stating that the individual has no spouse, or a certificate issued by the Chinese embassy or consulate in China stating that the individual has no spouse.