{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the technical principles of blockchain?","a":"Encryption Algorithm: Blockchain uses encryption technology (such  as SHA-256) to encrypt the data in each block."}]}],"pr":"e9b118528e1a8ebc14a878a792bde9c8914d5f7c4076e5214fc26ffed7d6daab"}