The numbering is usually a letter+6-digit number+year+number, for example: J123456-2019-001234。 The marriage certificate number is located in the next column of the marriage registration date and is named "Marriage Certificate Number". The meanings represented by the letters are: "J" indicates marriage, and "BJ" indicates remarriage.
The six digits after the letter represent the administrative region code:
The first and second places are provinces (autonomous regions, municipalities directly under the central government, special administrative regions).
The third and fourth digits are the summary codes for cities (regions, autonomous prefectures, leagues, and counties under the jurisdiction of municipalities directly under the central government).
The 5th and 6th places are counties (city districts, county-level cities, banners).
Next is the year of obtaining the marriage certificate and the serial number on the day of obtaining the certificate.
The marriage certificate number is important personal information, displayed on the second page of the marriage certificate's personal profile page. Like the ID card number, the marriage certificate number is unique and can only be queried on the marriage registration intranet. For safety reasons, do not disclose the marriage certificate number to others at will.