If you are dissatisfied with the criminal case, you can apply to the public security organ at the next higher level for review.
Legal link: Article 176 of the Procedures for Handling Criminal Cases by Public Security Organs If the complainant refuses to accept the decision not to file a case, he may apply for reconsideration to the public security organ that made the decision within seven days after receiving the notice not to file a case; The public security organ shall make a decision within seven days after receiving the application for reconsideration and notify the complainant in writing.
If the complainant refuses to accept the decision not to file a case for reconsideration, he may apply for reconsideration to the public security organ at the next higher level within seven days after receiving the reconsideration decision; The public security organ at the next higher level shall make a decision within seven days after receiving the application for review. If the public security organ at a higher level cancels the decision not to file a case, the public security organ at a lower level shall implement it.