The mobile phone book voucher was a form of currency that could be used on mobile phone reading platforms to purchase books on mobile phone reading software or online reading platforms. After using the book coupon, you can enjoy a discount or a free trial period when you buy books. To use the mobile phone book coupons, one needed to first obtain or register a mobile phone reading platform or an online reading platform user account. Then, when purchasing books, one could choose to use the book coupon and follow the instructions of the platform or software. Using a mobile phone book coupon could save on the cost of buying books, and at the same time, one could enjoy more reading discounts and a better reading experience.