{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology ensure the security and reliability of transaction payments?","a":"Immutability of data: Each block in blockchain technology contains multiple transaction records and the hash value of  the previous block, forming a chain-like structure. Once the data in a block is changed, it will cause the hash value of the subsequent blocks to change, making the entire chain invalid. Therefore, it is almost impossible to tamper with the data on the blockchain."}]}],"pr":"5a17bf00fa4ea7583368ddc168254fe178e0be4ed719093b41d39934531c2b90"}