{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What specific content can be queried in a blockchain historical information query?","a":"Transaction counter: Representing the number of transactions contained in each block, it helps to understand the  transaction activity level of the block."}]}],"pr":"d16a2c411341cacf424ad32220748b37b268ed960aa12dbb0342b5951c1b2aae"}