AlipayHK Online Shopping Double Rewards:
Get $20 online shopping e-coupon (upon spending $500 or above): 
https://qr.alipay.hk/281004082023062819053103001597348834
Upon a net spending of $500 or more at Watsons eShop, you may redeem a $30 online shopping e-coupon (can be used in the next purchase with a net spending of $600 or more) through a push notification in the AlipayHK App.

The promotion period is from now until 31 August 2023.
Offer subject to terms and conditions:
https://www.watsons.com.hk/en/c/alipayhk_watsons_0721_tnc