stored value is a means to reduce sales. For example, when you go to a restaurant to spend 51 yuan, when you check out, the system will automatically prompt you to recharge 55 yuan and send it to 21 yuan, so this customer will definitely come back next time and recharge 55 yuan, which is called stored value. Then consumers will come to the store again next time. In fact, this method of small proportion of intelligent storage value can give customers discounts and lock in multiple consumption.