{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do testing and validation nodes in a blockchain verify the security and reliability of new programs?","a":"Unit Testing: Write unit tests for each functional module  of the program to ensure that each module can work normally and there are no logical errors or exceptional situations."}]}],"pr":"261b1f68501926336dc96b71f5d95c8f3f7b6c4e4891a12bd7b50d0edd5e5f08"}