Mu ChangchunExpressIn 2005, the Chinese version of the digital currency project is called DC/EP, or digital money and electronic payment tools. Its functional attributes are exactly the same as banknotes, but in digital form. We define it as a 'digital payment tool with value characteristics'. " The Chinese version of digital money does not need an account to achieve value transfer.cellphoneThere is a DC/EP digital wallet, do not need the network, as long as two mobile phones touch, can achieve the transfer function. Traditional electronic payment is useless in the environment without signal, and DC/EP can pay without network, so it is also called "double offline payment" between revenue and expenditure.