{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"The continuous operation of blockchain depends on which important rules?","a":"The data structure in the blockchain system, consisting of a chain of blocks, each containing a certain amount of information and connected in sequence  by the time of generation;"}]}],"pr":"2e65fa3e3a88545e1830b5cdbba613d8f89c8ce424a32092887b63705f99481f"}