I think it is still reliable. Ampere, China enterprise, formal training company. I checked before. In addition, I am currently studying the course of fire engineer here, and I can keep up with what the teacher says. Is there any question I don't understand, just ask it during the live class? The teacher will answer carefully. Sometimes I call the customer service if I have a question, and the customer service will answer it quickly and help me deal with it. The pre-sales and after-sales links are well done and the service attitude is sincere.