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How to check the value-added authority of the after-sales service website of Zhonggong Books?
1. Log on to the book value-added service website.

2. Click "activate all with one click" on the left side of the website to enter the activation page, and follow the prompts on the page.

3. After successful activation, enter the service area corresponding to this book and enjoy the value-added services with corresponding rights.

Information is usually in it and can be downloaded: