{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to query the redemption record in the blockchain?","a":"Understanding the basic concepts of blockchain: Blockchain is a decentralized distributed database used to record  transactions and other relevant information. It is composed of a series of blocks linked in chronological order, each containing a certain number of transaction records."}]}],"pr":"acb8318b00e8427579526cca1103eda267f956e569f0ad7f05fdc67b8879d69d"}