Hehe, your level is all advanced. Go directly to Zhuji City Safety Supervision Bureau for consultation. You have to go in person, the civil servants of the safety supervision bureau are generally too lazy to pay attention to you. They will throw you a number like beggars. Never mind their attitude, after all, this is China. After you get the number they threw you, contact this safety publicity and education center. Generally, it takes one month from signing up for class to getting a special operation certificate. I assure Chairman Mao that this is the only correct way. It is convenient to make a detour, but you will pay a heavy price. You don't need to trust me, you just need to trust the producer …