I have been a famous official in Luzhou all my life, and the questions I bought from him have no answers. I want to listen to his live class, which is not repeated. Some key formulas are also empty in the handout. I don't know until I attend class, and I have to communicate with my teacher and say that my learning attitude is not correct. People always have emergencies, especially those who prepare for the exam, and they can't keep up with the live broadcast every time. I have attended many classes in educational institutions, and it is the first time that I have met such a petty institution.