{"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":"Code Review: First, conduct a thorough review of the new program code to ensure that it follows the basic principles and  norms of blockchain technology, and does not have any obvious vulnerabilities or security risks."}]}],"pr":"7ef789d2ffb1d889707aa3e5f5db79ba7bd8c3831ba85b05980687c759369dc1"}