It's free. According to the official information of Zhengzhou Authentic Bookstore, the Authentic Bookstore is an official WeChat account, and the books in it are open to users free of charge. Its use method is as follows.

1. First, open the WeChat program and search for genuine bookstores in the search bar in the upper right corner.

2. Second, pay attention to Zheng Pin's official WeChat account.

3. Then open the official WeChat account and click the free reading button in the lower left corner.

Finally, put the book on the shelf and read it for free.