The most convenient way to access funds from your international bank account while staying in China is to register for an Alipay or WeChat Pay account and link your overseas bank card. Step-by-step setup instructions are available at the link below:
https://mp.weixin.qq.com/s/r6VX-V7GnDrtgT2afO1tsQ
Cash payments are accepted in China, yet small change is often hard to come by at most retail outlets, as mobile payment via Alipay and WeChat Pay has become the mainstream payment method nationwide. For your convenience, we strongly recommend completing the Alipay or WeChat Pay registration prior to your trip to China.
The transit QR code generated within the Alipay app can also be used to take metros and buses.