{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"Why does blockchain have high security?","a":"Immutable data:  The blockchain uses encryption algorithms to link data in the form of blocks, forming an immutable chain. Each block contains a certain amount of transaction data and requires consensus mechanism verification and recording of new transactions. Once data is added to the blockchain, it cannot be changed, ensuring data integrity."}]}],"pr":"eaaa56555760c1cfb3a985b3fdefe70ffa3de08136b406326bcc527f614f672d"}