{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What situations could cause failure in message sending operations within a blockchain?","a":"Network congestion: When there is a large volume of transactions in the blockchain  network, it may lead to network congestion, thereby causing the message sending operation to fail to complete in a timely manner."}]}],"pr":"f19f7a27c01ef1bb0b85efbd1c7d03f94a8448945a211b30e4133aa242387461"}