1 Look at the appearance. Genuine books give people the overall impression of being neat, upright, and generous, while pirated books are irregular in appearance, as if they are crumpled, and soft, which can be seen from the appearance.

2 Paper. Paper is also divided into good and bad. Genuine books are all made of good paper, slightly heavier, while the paper used for pirated books is extremely thin and light. You can feel it when you hold two books in your hands at the same time.

3 Look at the clarity. The handwriting in the genuine book is very clear when opened, and the ink is sprayed very evenly, while the handwriting in the pirated book is blurry and unclear, the ink is dark and light, and the overall printing feels rough.

4 Look at the source of the book. Sometimes when you are really unsure, you can check the inventory on your computer to see where the goods are purchased from and what version of the book it is.

5 Look at the marks. Most genuine books have anti-counterfeiting marks. Different books have different anti-counterfeiting marks, so this is very important. Some pirated books also have anti-counterfeiting marks, but they cannot enjoy the online Value-added services, and genuine ones can enjoy the services.

6 Look at the error rate. There are too many typos in pirated books, and the error rate is very high. For example, there are blank pages, missing pages, and bound pages. In short, any book with a high error rate is a pirated book.