{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the differences between on-chain and off-chain expansion in blockchain?","a":"Transaction speed and efficiency: Due to the need for consensus algorithm verification and multi-party storage, the transaction speed on-chain expansion  is relatively slow. Off-chain expansion does not require consensus algorithm verification, has faster transaction speed, and is not affected by the chain."}]}],"pr":"32178d0c2197227dc46d6dc08cf4a71c60609f59c085df6da7b9054524254a23"}