According to the Provisional Regulations on Marriage Registration
Article 28 The conditions for accepting an application for marriage registration are:
The marriage registry has jurisdiction.
According to the Marriage Registration Ordinance
Article 4 When a mainland resident marries, both men and women shall go through the marriage registration formalities at the marriage registration office where one of the permanent residences is located. If a China citizen marries a foreigner in the Mainland, and a mainland resident marries a Hong Kong resident, a Macao resident, a Taiwan Province resident or an overseas Chinese in the Mainland, both men and women shall * * * go through the marriage registration office where the permanent residence of the mainland resident is located.
Article 5 Mainland residents who apply for marriage registration shall submit the following documents and supporting materials:
(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.
Extended data
Marriage registration ordinance
Article 6 In any of the following circumstances, the marriage registration authority shall not grant marriage registration:
Below the legal age for marriage;
(2) Involuntary;
(3) One or both parties have spouses;
(4) Belonging to lineal blood relatives or collateral blood relatives within three generations;
(five) suffering from diseases that are medically considered unsuitable for marriage.
Article 7 The marriage registration authority shall examine the certificates and certification materials issued by the parties to the marriage registration, and ask about the relevant information. If the parties meet the conditions for marriage, they shall register on the spot and issue a marriage certificate; If the parties do not meet the conditions for marriage and refuse to register, they shall explain the reasons to the parties.
Baidu Encyclopedia-Provisional Regulations on Marriage Registration
People's Republic of China (PRC) Central People's Government-Regulations on Marriage Registration