{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology solve the problem of data tampering and forgery?","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 accordingly."}]}],"pr":"fc21b0f9449f97fb6c33bc6b1a7a5c5a2c70e4d5ade399ef06620113948bb365"}