China’s central bank on Monday warned that Rejecting cash as a form of payment was illegal, saying that such practices could eventually could cause the loss of confidence in physical money and was unfair to those not accustomed to electronic payments.

source https://www.reuters.com/article/us-china-payment/china-says-rejecting-physical-cash-is-illegal-amid-e-payments-popularity-idUSKBN1O902F?feedType=RSS&feedName=technologyNews