nostr:npub1l3gpk6vrudg8r67swqlex5alv9ch59s4lw46kk6hekuxe2n3aczsyqvu48
> So you're basically just getting the vendor's userid via the qr code
Sounds right. The QRCode isn't essential, I guess. There are others ways you could enter a vendor ID. But it was a very smooth HX* with very little room for error.
I seldom saw anyone else in China paying any other way. I used cash like the weirdo I am, with debit card as a backup.
* Human eXperience