{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the possible paths for blockchain upgrading?","a":"Smart contract upgrade: Continuously improve and enrich smart contract programming languages, enhance the security and flexibility of contracts, and support more complex  business scenarios."}]}],"pr":"21f44b1597baaf86325d151ae84f761b373b6328da09750caf273b0a15a056a7"}