Legal basis: Criminal Procedure Law of People's Republic of China (PRC).
Article 146 When it is necessary to solve specialized problems in a case in order to find out the facts of the case, a person with specialized knowledge shall be employed for appraisal.
Article 147 After the appraisal is completed, the appraiser shall write an appraisal opinion and sign it. If an appraiser intentionally makes a false appraisal, he shall bear legal responsibility.
Article 148 If there is any objection to the expert opinion, the investigation organ shall inform the criminal suspect and the victim of the expert opinion used as evidence. If a criminal suspect or victim applies, he may make supplementary appraisal or re-appraisal.