Xiaomi e-books can be transmitted via Wi-Fi. To use this feature, make sure that the device is connected to the Wi-Fi network and the Wi-Fi transmission function is enabled.

The specific operation steps are as follows:

1. Open Xiaomi e-book and select "More Settings";

2. Find the "Connect" option on the settings page, and then select "Wi-Fi";

3. Check whether the device is connected to an available Wi-Fi network. If the connection fails, try reconnecting or replacing the Wi-Fi network.

4. Select the place where you want to use the Wi-Fi network, such as office, coffee shop, etc.

5. Click the "Wi-Fi transmission" button of Xiaomi e-book to view the transmission settings;

6. If you have connected the Wi-Fi network correctly, Xiaomi e-book will prompt you to select the book to be transferred, and click the "Transfer" button to start the transfer.

After completing the above steps, the books will be available for viewing and downloading in Xiaomi e-book.