{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the irreversibility of transactions?","a":"Decentralized structure: Blockchain adopts a decentralized network architecture, with data stored on multiple nodes, and there is no single central controller. Therefore, to tamper with or delete transaction records on the  blockchain, it is necessary to tamper with or delete all related node data simultaneously, which is virtually impossible to achieve in practical operations."}]}],"pr":"4dd42988c981b5ee03ae59acf96f7a0752f469cf8f634e06946047ea7c06a2a2"}