Legal Analysis: Article 90 Provisions on Appraisal If it is necessary to solve controversial special problems in a case in order to find out the facts, a person with specialized knowledge shall be appointed or hired for appraisal, and after appraisal, an appraisal opinion shall be written and signed. The identification of the interpretation of the provisions refers to an investigation activity in which the public security organ assigns or hires personnel with specialized knowledge to identify and judge the controversial specialized issues in the case, so as to find out the facts and solve the controversial specialized issues in the case. Appraisal is an important means of investigation in handling public security cases. It plays an important role in collecting evidence in time, accurately exposing illegal acts and correctly identifying the facts of the case.

Legal basis: People's Republic of China (PRC) Public Security Administration Punishment Law.

Article 90 In order to find out the facts of a case, if it is necessary to solve controversial special problems in the case, a person with specialized knowledge shall be appointed or hired for appraisal; After the appraisal, the appraiser shall write an appraisal opinion and sign it.

Article 99 The time limit for public security organs to handle public security cases shall not exceed 30 days from the date of acceptance; If the case is serious and complicated, it may be extended for 30 days with the approval of the public security organ at the next higher level.

In order to find out the case, the time limit for appraisal is not included in the time limit for handling public security cases.