You have to have an intermediate certificate to take an advanced certificate. After you have the intermediate certificate, you can join a professional training institution, complete the training course and obtain the corresponding certificate through the prescribed examination (operation+theory). (Shortcut: Some training institutions can buy directly as long as they pay the money, without training and examination)

I know that the training fee of Tianjin Teachers College of Engineering is 1000, so I can learn real things. I can get it directly from other institutions in Tianjin by buying 260.