{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"Can the source of return information be specified in a blockchain?","a":"The source of return information in the blockchain can be specified. In a blockchain system, each block contains one or more transaction records, which are initiated by the corresponding parties and verified by nodes in the network. Users can send requests to the blockchain system as needed to query information about specific blocks or transactions. The returned information includes transaction data in the block, the parties involved in the transaction, and the transaction time, among others. The sources of this information can be various nodes in the blockchain network or specific transaction databases. However, it should be noted that the decentralized  nature of the blockchain makes it difficult to control the source and authenticity of information to a certain extent. However, through encryption technology and consensus mechanisms, the blockchain ensures secure and reliable transmission of information."}]}],"pr":"801c72c3f7276e0b011aabd776b3d2f55a8d9942fa996a8b350ad0764328bb3b"}