Some are genuine, some are not. If you want to buy genuine books, you should go to a guaranteed platform, or Xinhua Bookstore, official website, etc. You can identify the authenticity of the book by looking at the handwriting, paper, etc. If you buy a pirated book, you should contact the seller as soon as possible, or you can contact Douyin customer service to intervene and apply for a return and other measures to ensure that your legal rights and interests are not harmed