{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"Can smart contracts in blockchain be modified?","a":"Non-essential modification: In some cases, the implementation logic of a smart contract may need to be adjusted or optimized. In this case, a new  smart contract can be published to replace the old one, thereby upgrading the function. After the new smart contract is deployed on the blockchain, the old smart contract will be replaced."}]}],"pr":"42bd8caa7df81133cfc26b45c5542b1716686815bc658b2c80aebe00dcb9133b"}