{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain improve the efficiency of data trading?","a":"Decentralized structure: Blockchain uses  distributed node consensus algorithms to generate and update data, eliminating centralized management structures and reducing the costs of data transmission and processing."}]}],"pr":"c47bc900e05dca4c4ea5c1ac9ce8c76e8e2e99743889008e8694023145da57c2"}