First of all, I doubt the person who asked this question. Have you figured out the types of these two books? Qidong exercise book is an exercise book, and the coach is an explanation book. Can these two books be compared with each other? If you want to compare, I'll tell you one, which is the midpoint of the book that matches the manual. The books in the middle of this book are much better than Qidong exercise books. The questions in the book are carefully selected, not to mention the pamphlet inside, which is a solution. Qidong exercise book doesn't exist at all. The midpoint of the recommended book purchase.