{"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":"Extend the transaction expiration time: According to the actual situation of the blockchain network, you can adjust the validity of transactions. For example, you can set the validity of a transaction to a longer period,  such as several hours or days, to ensure there is enough time before the transaction expires."}]}],"pr":"09e9f11640650081d4cf1f849335c706628da1e337c01e5d60a51302f6a94716"}