{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"Why does blockchain have high security?","a":"Data cannot be tampered with: Blockchain uses encryption algorithms to link data in chronological order, forming an unchangeable 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 tampered with or deleted."}]}],"pr":"f0920d1b520fb40a6e7650a285e0ed060f6b0b935429c335f7729e9fa90ea519"}