If you are an assistant, these are the two books, but to give you a problem set, you should have corresponding exercises. If you don't send it, it means that the training institution is not doing well. It can also be said that this training institution is not so good, so you should be careful.

You must learn the basics, no matter how many levels. The assistant is usually a third-level manager. Therefore, you can only learn from assistant enterprise trainers when you take the exam as an assistant, but you still have to learn from enterprise trainers if you want to take a more advanced exam. At present, I can only learn assistant enterprise trainers.