Now, no matter which province's safety supervision bureau issues the certificate, as long as it is truly universal in the whole country, the special industry operation certificate must be examined annually, and the annual examination is also the national general examination, which means that it must be examined annually wherever it goes. It used to be once every two years, but now the new rules are three years. If you want to handle it directly or you are not clear, you can ask me It will take about 10 days to issue the certificate.