I suggest you listen to the open classes of each training class first to see what the differences are, and which teacher's method is more suitable for your quick and efficient review. Video course is to help you review in the fastest and most efficient way, so that you can take fewer detours and do less useless work, and choose it in advance when you sign up for class.
Each cram school can listen to it first. Tencent class and intellectual property class have open classes, including how to review the tutorial class, listen first and then choose.