{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How is the irreversible characteristic of blockchain technology achieved?","a":"Data consistency: The data  in the blockchain uses distributed ledger technology, with each node saving the complete ledger data. When new data occurs, all nodes perform synchronization and verification to ensure data consistency. This makes the blockchain resistant to tampering, as altering the data would require altering all the nodes simultaneously."}]}],"pr":"dcb4eeae802a56251e2eceb87761bfc55174936faf6c21589547d90f7e67c32c"}