If you buy luxury goods and watches, it is a tax refund method that directly deducts the tax refund amount (not to say that the airport will wait one month after stamping), and you must use a credit card to guarantee it.
If you can't use a credit card to guarantee or don't want to, you can only pay in full, and then stamp it for a refund.
But now Global Blue Alliance can use Alipay for refund.