User flow
AlipayHK users can obtain vouchers from the merchant promotion page in the AlipayHK app. Those vouchers can be redeemed when users perform payment by using AlipayHK app in merchant's offline/online stores.
The vouchers will be redeemed automatically if redemption conditions are matched. The actual amount that the user has to pay will be equal to the order amount minus the face value of the coupon. For Example, when a $ 100 HKD payment order is placed from the merchant, if the user has a $10 HKD cash coupon issued by the merchant, the coupon will be redeemed automatically and the user will have to pay $90 HKD for the order. This transaction will settle $90 HKD to the merchant, assume that no fee is deducted from the transaction.