The opinions of criminal experts are usually known in a few days.

1. The authentication institution shall complete the authentication of the entrusted matters within 30 working days from the date of signing the judicial authentication agreement with the client. However, in the actual appraisal practice, it often takes longer than this stipulated time, and some of them take 45 days or two months. Therefore, the actual notice time after the end of the review meeting shall prevail. 2. If the entrusted appraisal involves complex, difficult, special technical problems or the inspection process takes a long time, the time for completing the appraisal may be extended with the approval of the person in charge of the appraisal institution, and the extension time shall generally not exceed 30 working days. In other words, two months should be an extended evaluation period. If the appraisal agency still delays time, if there are no other special circumstances, it should be illegal overtime appraisal. Patients and their families should actively urge the appraisal institutions to issue appraisal conclusions. 3. If there is another agreement between the judicial authentication institution and the client on the completion time of the authentication, the authentication report shall be issued according to the agreed time. 4. The time required to supplement or re-extract the identification materials during the identification process is not included in the identification time limit. If the appraisal materials are not provided in full and on time due to the reasons of the parties concerned, and the appraisal time is delayed, the delaying party shall bear legal responsibility. 5. Selection and determination of experts.