According to CNR.com, the National Engineering Laboratory of Big Data Circulation and Trading Technology and the Shanghai Data Exchange officially launched the construction of the first domestic data transaction chain. At present, the data transaction system of Shanghai Data Exchange has established six business links including registration, listing, trading, delivery, clearing and settlement, and certificate issuance. More secure, efficient and transparent. Before the transaction, the registration and listing of the data product is realized by setting the basic information, price and transaction method of the data product in the smart contract. During the transaction, both parties to the transaction can monitor the progress of the transaction process in real time by depositing each transaction order, delivery information, and settlement information on the chain to ensure the credibility and accuracy of the transaction. After the transaction, the transaction certificate will be generated through the blockchain, and each certificate will be assigned a unique digital identifier, which will be associated with the data on the chain of the entire transaction process, and support the right of the transaction product, transaction supervision and dispute resolution.