> No it doesn't. If I print out my payment QR code, you can scan it and pay me even if my phone is off. When I buy vegetables at the market, the vendors have th

> No it doesn't. If I print out my payment QR code, you can scan it and pay me even if my phone is off. When I buy vegetables at the market, the vendors have their Alipay and WeChat QR codes displayed on stickers. That's fine for very small amounts like groceries in a market but this is very easy to cheat with a fake client app on the buyer's device.