A, look at the paper: the genuine version uses light offset paper, which is light in weight; Non-genuine paper will use ordinary paper to save costs: writing paper or offset paper! Identification method: find a book with about the same number of pages, weigh it with your left and right hands, and you will obviously feel that the original is lighter! For version A, we can only read its papers. B folio: There is an item on the copyright page of the book (such as 640 * 960 mm116), where16 means folio. The genuine one is 16. The non-genuine one may be 32, which is a little shorter than the genuine one. C. price comparison: the price of genuine books is higher. In order to attract Taobao friends, I sold some books at the purchase price (5-6 fold). Below this price, it is ok. If the seller sells the A version of the book as genuine, I have no choice but to compare it with some genuine books after you receive the book.