There are quite a few ways to pay for a metro or bus ride in Shenzhen. Some of the most used ways include:
1) Cash;
2) The pay-as-you-go "Shenzhen Tong" (深圳通) card for public transportation;
3) The "Chengchema" (乘车码) WeChat miniprogram;
4) The "Shenzhen Tong" QR code, which can be accessed via the "Shenzhen Tong" WeChat miniprogram, Alipay, or the "Shenzhen Tong" app;
5) Certian public transportation cards issued in some other cities.