{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the working principle of blockchain?","a":"Data Structure: Blockchain is a chain composed of a series of  data blocks (called blocks) linked in chronological order. Each block contains a certain number of transaction records and is associated with the previous block through a hash algorithm, forming an unchangeable chain structure."}]}],"pr":"f7d81607b4283c82f247fd1839b6b6276506abecbf7e1297a9c4e9d761abcd18"}