Hello, you can go to the local Zhonggong Education and ask their staff to take a look at it for you, or you can inquire by yourself in the following ways:

See if the handwriting is clear.

See if the publication date is not this year. How many times will the second cover be printed in a few years?

There is a card scratch layer at the back of the page with the card number and password on it. It is a book that can really listen to courses in class.

In addition, if you buy books, try to go to Xinhua Bookstore or Zhonggong Education Store. Online shopping is risky. Pay attention to whether the book you bought is the latest edition of that year.