{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the characteristics of transaction confirmation time in blockchain?","a":"Data immutability: Each block contains a certain amount of transaction data and is connected to  the previous block through a hash link, forming a continuously growing chain. Once a transaction is added to the blockchain, it cannot be tampered with."}]}],"pr":"ca5d489523d40685383b8971c8365e9781c40b740891ac2ef46e6bfbc097513e"}