On August 21st, economist Song Qinghui issued a message on Weibo that the digital currency that the central bank is preparing to issue is very different from the bitcoin we know. Bitcoin is a decentralized digital currency, that is, the ledger is public, but the account is anonymous. In short, no one knows who this account is. The digital currency issued by the central bank is centralized. The account must be a real-name system. The transaction can be traced back. It is a semi-private account book, and only the government has the right to consult.