{"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":"Analyze and evaluate the code of the new program: Testing and validation nodes first conduct in-depth analysis of the code of the new program to understand its design principles and implementation methods. This helps  them discover potential security vulnerabilities and issues."}]}],"pr":"95f9a5382c959e047fc52db56f6330e1a25a86a57d8ed057b81d8a9087d54974"}