Why is there an enforcement notice after the fine is paid?

Legal analysis: it should be caused by the court's failure to lift the breach of trust in time. It is suggested to apply to the court to cancel the breach of trust.

Legal basis: Article 271 of the Criminal Procedure Law of People's Republic of China (PRC), if a criminal sentenced to a fine fails to pay it at the expiration of the time limit, it shall be enforced by the people's court; If it is really difficult to pay due to irresistible disasters and other reasons, the people's court may postpone, reduce or exempt the payment as appropriate.