It is not difficult to analyze some possible factors contributing to this situation.
On the one hand, thanks to the massive user base and various payment scenarios in China, mobile payment like Alipay and WeChat Pay has enjoyed absolute advantages in market competition.
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Mobile payment can also be used for transferring money, and users can pay family or personal bills through it, such as water and electricity bills. Its convenience enables China to edge its way towards being a cashless society.
On the other hand, besides convenience, mobile payment has a lot of advantages that cash payment can't match: much cleaner, more secure and no need for odd change.
According to the situation in the chart, the cash-free society is coming, and we will bid farewell to cash. So please protect your smart-phone.