{"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 the programming language  and execution environment of smart contracts, enhancing the security and efficiency of smart contracts."}]}],"pr":"4c5da3eac8368c191f074eb17ec83a7e409fa5be79b6becc121ae29f49833e16"}