{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the characteristics of blockchain?","a":"Distributed data storage: Blockchain stores data disseminated across multiple nodes in  the network, enhancing data security and reliability."}]}],"pr":"81b41a4400cbb6cfe1201391063c42fd7a9b707f88a66c61224f7aa08a519c21"}