This is where China has it right. You can pay 1 yuan by WeChat no problem. Scan the QR code, enter "1", the shop terminal says "1 yuan paid" out loud, job done. And yes some things are 1 yuan, for example picking up a parcel from a parcel locker a day late.

Yes, the entire economy is beholden to two payment portals (WeChat and Alipay) and I'm sure the analytics are off the scale and you're completely fucked if you can't use or get banned from the platform but the actual 99% user experience is exactly the microtransaction dream that people have been unable to solve in the west for decades.