{"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":"865981afffbf5f32c4335011e9316f94c8e990ed52ebaa52371336383b199da1"}