Because I applied for the Six Gods Class in BT College, I think the supplementary materials are very good. Summarizing a word is refining, and his teaching materials are all about listing important contents and real questions repeatedly. Some exams that have not been taken for hundreds of years are provided in the form of scanning codes. Anyway, I didn't read the contents of those scanned codes last year. The textbook is divided according to how much you can learn every day, and there are questions and answers after each chapter to help you find the missing parts. I used his 2 1 day textbook and real questions when preparing for the exam. Everything else is useless. I think it's very good. The textbook is very refined, and the audit textbook "Talking about People" can be compared and seen. There are open classes. Just download the APP of BT College.