What about the hard card of WeChat Alipay scanning QR code?
Wechat should have this service. After people generate a receipt code for you, you need to customize the corresponding listing and authorization, which requires you to spend money to buy it, just like Alipay, three dollars! You can do it in Alipay and mail it to me after you finish it. In fact, it is the same to customize yourself. Print the received bar code into color printing, and then make two plastic shells where you expect to handle it. It's just trouble.