{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the principles of blockchain technology?","a":"Data Structure: Blockchain uses a block-chain data structure, which combines data blocks in a sequentially connected way to form a chain-like structure.  Each block contains a certain number of data records and is connected to the previous block through a hash value, forming a distributed ledger that cannot be tampered with or forged."}]}],"pr":"cd7620d6c86fa8ecd2ca2b190f7eb6b4dd3fc76a7ed42bdcd857a84c4e9ca819"}