{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the technical principles of blockchain?","a":"Cryptography: Blockchain uses encryption algorithms (such as SHA-256) to ensure the security of data and authenticate the parties involved in transactions. Encryption technology can prevent data tampering and forgery."}]}],"pr":"954796cc3c80adbd807917c8f5885ae756f4623f3f2bb5197661bbf9e83f43b3"}