{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology ensure the validity and confirmability of transactions?","a":"Distributed ledger: Blockchain technology records transactions in a distributed  ledger, and each node can participate in the maintenance and verification of the ledger, avoiding single-point failures and security risks of centralized exchanges."}]}],"pr":"b8a41b65476386a692fd058b54fa0bfe2a32de17b5c5a74db717ec985b831dbe"}