I just personally experienced the same scam as you, and I came to Baidu to find the answer. In fact, not only this jewelry store uses this trick (called Liu Yufu Jewelry), saying that jewelry can be obtained with shopping receipts, and the Double Eleven activities give back to new and old customers. Then I told the receiving code that you were lucky to get the products of 1.390 yuan and the coupons of 1.000 yuan, so I started to let you choose the styles. I picked a jade pendant, the price was just 1 0,390, and then I told you that there was a coupon of 1 0,000 to match a necklace. Their necklaces are all 499 pieces, saying that they contain platinum. You can now get necklaces and pendants worth 1.390 yuan with coupons. That sounds too exciting. If I hadn't been cheated before, I would have been cheated this time. I thought in my heart that there would be no pies in the sky, only traps. After reading the message that Zhu Bao, a different fisherman, was a scam at the beginning of Baidu, I decisively turned and left ... Wow, that was close. Remember, big brothers, there will be no pie in the sky.