1. In a certain period of time, the main commodities are purchased for specific commodities. After buying a car, you can exchange it for other designated goods on the commodity list page. When purchasing the main commodity, only one other designated commodity can be exchanged; The main commodity is purchased repeatedly, and the quantity of purchased commodities cannot be accumulated.

2. If the main commodity A is out of stock, but there are still other spot commodities in the order, the redeemed commodity B can still be issued; Otherwise, the exchanged commodity B will not be shipped separately. Orders participating in this activity cannot enjoy VIP discount at the same time. Orders using gift certificates do not participate in the event. Exchange is to add money to buy the second piece at a preferential price. Redemption is a way for merchants to promote sales, with the main purpose of encouraging consumption.

3. Take the shopping malls in 500 yuan as an example. If the price of the goods you want to buy exceeds that of 500 yuan, you can choose one of the goods designated by the supermarket and add the corresponding exchange price to get his exchange goods. The exchange of shops depends on the rules of each shop. Basically, you can exchange any prize or how much you fill in the store, and then add a few more pieces to buy some products. Every store has different rules.

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