The concession box is the type of entertainment service app developed under the umbrella of beijing city interactive ltd. The integration of large data and information resources online provides users with core functions such as business coupons, and household services, as well as marketing support such as data statements, text messages, advertising, exclusive malls, etc. For the purpose of digitizing business entities. Preferential box app is a mandatory shopping device for a mobile phone, and the soft box software provides free internal and hidden coupons: it is issued in cooperation with the merchants with very high discounts, even as low as freight. Preferential box app also includes large brand coupons: promotion coupons for large brands such as electricity, clothing, footwear, etc. Are issued occasionally. It must be cheaper than everyday purchases. One dollar on a discount box and one dollar on a large piece. Preferential box app provides 10,000 product coupons in real time, a...