Its exactly the same thing in Australia. Either scan the QR code or write your name down on a piece of paper. And it's absolutely bloody everywhere, supermarkets, all shops, restaurants, bars, everywhere you go around town must scan QR code.
The thing that really shits me off the most, when you are inside a shopping mall, every single shop inside the mall has its own QR code at the door, so go to supermarket, scan, go next door to Watsons, scan, go to the food court, scan, every bloody minute need to scan something and there's a crowd of people outside each shop fiddling with their phones and jostling for position around this A4 sized QR code waiting for their phone camera to focus and detect the code.
Living in HK I got used to Wechat and Alipay a couple of years ago and scanning random QR codes around town to get discounts and promo's etc. But now Australia has gone QR mad that will put China to shame!