| 摘要 |
Customers saves coupons to a server which called as coupon service server. The coupon is representd as an electrical data. This is issued by the company which makes the item corresponds the coupon. The collected coupons are used in retail store. The store connects to the coupon service server when the customer pays the money for the putchasing items with a identification card. The identification card can be either a printed temporary card or a memvership card. When the identification card submitted to the casher, the available coupons are searched with the identification number. That is, with only one identification number(customer number), all matching coupons are processed together. After all, customer doesn't need to bring all printed coupons to a retail store in order to consume the coupons.
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