You can't continue to use it without approval. The validity period of the special operation certificate is six years.

Need to review for three years, review time is three months in advance, and sign up for the re-examination training exam. If there is no re-examination certificate within the time limit, it will be invalid and cannot be re-examined after three months. "

Guided by the Public Security Management Corps of Sichuan Provincial Public Security Department and assisted by Sichuan Blasting Equipment Industry Association, Southwest Jiaotong University initiated and opened the online learning platform for continuing education of Sichuan "Blasting Engineering Technicians" on 20 16. On this basis, 20 19 launched the "Online Platform for Continuing Education of Explosives", and simultaneously launched the mobile APP, so that the training and learning are not limited by time and place. "Online Learning Platform for Blasting Continuing Education" is managed by Jiaotie Quality and Safety Education and Training Center authorized by Traffic Safety Technology Research Institute of Southwest Jiaotong University. The teaching and research center of blasting engineering technology employs domestic authoritative experts as visiting professors, adopts high-standard recording and broadcasting equipment, and records the training courseware of blasting technology and blasting safety related majors in batches, so as to continuously provide high-quality learning and education resources for the students of training institutions.