The most essential difference is that genuine books pay royalties, have copyrights, and pirated books don't. As for paper and printing, it depends on the publisher's decision, which does not affect whether they are genuine or not. Generally speaking, due to the increase in the cost of royalties, the price of genuine books will inevitably be higher. Only by improving the quality of paper and printing can people feel that it is worth buying genuine books. Piracy has certain risks. In addition, the most favorable tool for its competition with genuine products is price. In order to reduce prices and increase profits, but also to reduce risks (if pirated books with good paper and printing quality are caught and confiscated, it is a loss! Only the cost can be reduced, and the most direct way to reduce the cost is to reduce the quality of paper and printing, which leads to the wrong view that "the difference between genuine and pirated lies in the quality of paper and printing". There are few typos in genuine books, and many typos in pirated books are generally judged from the place and price of purchase. Large bookstores are generally authentic. If you want to ask them if they are genuine in a small bookstore, if they sell you books that you want to buy, but you find them pirated, they will be responsible, but if you want to buy pirated books, they will say they are pirated. Generally, genuine books don't get a 7.5 discount, except for very old books.