{"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":"ecurity Auditing: Conduct a security audit to  identify potential security threats and vulnerabilities in the new program, and implement necessary patches or improvements."}]}],"pr":"7947f96600d14e1b8cd8808f3fe48bd2d86a156f9a37029fb79dcbc06dae76ea"}