{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the advantages of blockchain technology for traceability management?","a":"Data cannot be tampered with: Each block contains the hash value of the previous block, forming a chain structure. Once the data in a block is changed, it will affect the hash value of the subsequent blocks, making the entire chain invalid. Therefore,  it is difficult to tamper with the data stored on the blockchain."}]}],"pr":"4b064313d99f3cc1680341ccbca63f70c81487e70011e201664b6ffa46365cdf"}