{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the technical principles of blockchain?","a":"Data Structure: Blockchain uses a chain-based data structure, connecting data blocks in chronological order to form  a continuously growing chain. Each block contains a certain amount of data and validation information, as well as the hash value of the previous block."}]}],"pr":"be8b3015e4439cca53ad927353ae3d9292ef31197c385d43d200827dcc8b70f5"}