{"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 disseminately on  multiple nodes in the network, enhancing data security and reliability."}]}],"pr":"2e1982d24cebc9a99ea9f1eff2cbb37a0bdfae9b7472de2e3d40ff33bd1c466b"}