{"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-like data structure, arranging data  in blocks in chronological order, with each block connected to the next through a hash value, forming an unchangeable chain-like structure."}]}],"pr":"27e58a874f390b2264f51f880b7b3605f208b48868c09bd73c0dc1d794f0a649"}