China, from cities big to small, is beyond cashless. Everything you need on a daily basis is done on your phone mostly through two apps -- Wechat and Alipay. If you are coming to China, make sure you download these two apps and they will make your life in China so easy and convenient.
What's Wechat and Alipay? Please check out the following links for details:
https://youtu.be/W1Ghx9_3ZC0
https://youtu.be/t5ElQaVjQZE