If the registration of other warrants of mortgaged property expires, but the borrower fails to repay it, the borrower shall provide a guarantee. If the other party fails to provide or repay, it shall immediately sue, apply for property preservation, seal up the other party's property and request repayment. Avoid the other party from selling the mortgaged property. It is difficult for them to defend their rights.

People's Republic of China (PRC) Civil Procedure Law

Article 100 A people's court may, on the application of the other party, order the preservation of property, order the implementation of certain acts or prohibit the implementation of certain acts in a case that may cause difficulties in execution or other damage due to the behavior of one party or other reasons. If the parties do not apply, the people's court may also order the adoption of preservation measures when necessary.

When the people's court takes preservation measures, it may order the applicant to provide a guarantee. If the applicant is unable to provide a guarantee, the application shall be rejected.

After accepting the application, the people's court must make a ruling within 48 hours in case of emergency; Those ordered to take protective measures shall be executed immediately.