{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the principles of blockchain?","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 cause the hash value of the subsequent blocks to change, rendering the entire chain invalid. Therefore, if you want to tamper with the data on the blockchain, you need to tamper with all the related blocks simultaneously, and during the tampering process."}]}],"pr":"1498cffe4ab9f63970a8811a8e60a0b5f38abeb7a697513ad11ecf84c285c688"}