I bought it on Dangdang and Taobao, last year's, because when I bought it at the beginning of the year, this year's new one hasn't come out yet, but there is no big difference between last year and this year's, that is, there is a little difference in current affairs and politics. You should be able to buy this year's new edition now. I bought last year's pirated version because it was much cheaper. But it does not affect normal learning. Comprehensive knowledge is the principles of pedagogy, educational psychology, moral education, teachers' morality education, basic theory and practice of curriculum and teaching, common sense of class teachers' work, foundation and application of modern educational technology, educational policies and regulations, and current affairs and politics. This book suggests that you buy another set of simulation test papers. "Subject professional knowledge" is the basis of subject specialty, subject curriculum standards and teaching materials, and subject curriculum guides teaching. There are also supporting test papers. That's basically all. I hope I can help you. In addition, look at the publishing house. I wish the exam success.