At present, there are many institutions that can provide you with trainer services, depending on how you choose and what standards you want to achieve. There are many kinds of international and domestic certification qualifications, such as international trainers certified by London City Industry Association and international trainers certified by Cambridge University. You can go to our teacher's office to learn about this information, as well as PTT certified international trainers, which is an American institution. The authority of this institution needs to be tested. Other international trainers are basically individuals. Domestic certification is mainly based on professional qualification certificates (which will not be explained in detail here). What I want to say is that there are not many professionally certified trainers in the domestic training market. If you have professional quality, you should choose an authoritative training institution with a sense of responsibility to society. Let's communicate more when we have the opportunity. I am also a domestic trainer and signed a part-time trainer with Shidao. Moreover, the teachers will always put forward some constructive opinions and suggestions for the new courses I develop. I think training is of great help and improvement to me. That's why I share some with you. For details, please consult their education consultant, Miss Liu.