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

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.