Yu Qin speaks well, but he is a little strict and open-minded; If you want to study step by step, you can choose Deng Lihua. She speaks slowly, but she is really detailed. However, if you only want to pass the second grade, you don't need to go to class. I followed it for half a semester, so I stopped. I think this is a waste of time. I just bought books to read. The book on future education I bought passed easily, and I am excellent in computer.