There are a lot of information and policy trends in the 233 online school, which can keep you informed of the exam trends at any time. There are also some free courses, and of course there are paid courses. You can listen to the teacher's class when you encounter difficulties in your study.

More importantly, there are many exercises and examination questions over the years. These themes are provided free of charge. And these exercises can be divided into chapter exercises and comprehensive exercises. He will record the questions you did wrong, which can help you to know the learning situation in time.

233 online school also has a mobile APP, which can be downloaded to your mobile phone and you can learn to do problems at any time. When I was preparing for the fire engineer exam, I downloaded the 233 online school APP. It feels very practical.