{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"One common issue in blockchain is the expiration of transactions, how can it be solved?","a":"Increase transaction confirmation speed: Transactions in a blockchain system need to undergo a confirmation process before being included in a block, which usually takes some time. To solve the expiring transaction problem, you can optimize the consensus algorithm in the blockchain, increase the speed of block generation, and  thereby accelerate transaction confirmation."}]}],"pr":"dabea350101b80479bb60b77a45eb572c5e4730baea35d61030a907474be8001"}