According to the Management Regulations on Safety Technology Training and Assessment of Special Operations Personnel

Article 22 Where the operation certificate for special operations needs to be re-examined, the applicant or the employer of the applicant shall, within 60 days before the expiration of the validity period, apply to the original examination and certification authority or the examination and certification authority at the place where it works, and submit the following materials:

(1) A health certificate issued by a community or medical institution at or above the county level;

(2) engaging in special operations;

(3) Records of passing the safety training examination.

If it is necessary to extend the renewal of the special operation certificate at the expiration of the validity period, it shall apply for an extension of review in accordance with the provisions of the preceding paragraph.

Article 21 The operation certificate for special operations shall be reviewed once every three years.

Special operators who have been engaged in this type of work continuously for more than 10 years within the validity period of the special operation certificate, and strictly abide by the relevant laws and regulations on production safety, may extend the review time of the special operation certificate to every 6 years 1 time with the consent of the original assessment and certification authority or the assessment and certification authority of their unit.