{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the characteristics of smart contracts in blockchain?","a":"Autonomous and self-sufficient: Smart contracts execute automatically according to pre-set terms, without external intervention, ensuring the fairness and accuracy  of contract execution."}]}],"pr":"38d221b8d1ce7832f9041cb0cd8c6d5ebd7d4e1d6e0d05b926b5f728d9eed265"}