{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What specific content can be searched in a blockchain through historical information query?","a":"The historical information query in the blockchain can mainly retrieve the following specific contents: 1. Block header information, including the previous block  header hash value, timestamp, random number, difficulty target, etc.; 2. Transaction details, such as the sender, receiver, amount, and digital signature of the sender; 3. Transaction counter, indicating the number of transactions contained in each block; 4. Block size, representing the size of the data in each block. By querying this information, you can understand the historical transaction records of the blockchain, the generation time of the blocks, the difficulty coefficient, and other relevant participants."}]}],"pr":"1d3b6cdd5763b49e63142520088aa4199c96c2a5f845441d8bd87fe7921bc905"}