| 摘要 |
The invention relates to a receipt, including an individual QR code provided on a product and outputted on the receipt when a consumer buys said product. The consumer may connect to the webpage of a company having sold the product using his/her smartphone which he/she carries, and obtain information on the product through product feedback. The company having sold the product may store information, such as the type and time of purchase of the user in a database, and send, to the smartphone of the user, information pertaining to a time to repurchase the product. |
