legal ground
Article 1076 of the Civil Code of People's Republic of China (PRC)
If the husband and wife voluntarily divorce, they shall sign a written divorce agreement and apply for divorce registration in person at the marriage registration office.
The divorce agreement shall specify the expression of willingness of both parties to divorce and the consensus on matters such as child support, property and debt disposal.
Article 1077
Within 30 days after the marriage registration office receives the application for divorce registration, if either party is unwilling to divorce, it may withdraw the application for divorce registration from the marriage registration office.
Within thirty days after the expiration of the time limit specified in the preceding paragraph, both parties shall personally apply to the marriage registration office for a divorce certificate; Those who fail to apply shall be deemed to have withdrawn their application for divorce registration.
Article 1078
The marriage registration authority shall register and issue a divorce certificate if it finds out that the two parties are really divorced voluntarily and reach an agreement on matters such as child support, property and debt handling.