{"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":"5533208de6b3bf928e710799d354ac5c0ed996b658e55d90826d9f539f34791b"}