{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the precautions needed for blockchain upgrading?","a":"Consensus mechanism optimization: The consensus mechanism is a core part of  blockchain, and its performance, security, and adaptability should be fully considered during the upgrade to achieve a more efficient and stable network."}]}],"pr":"f93c3df3ba95ad56acbefdf5b8ee94b860741245572212c731f9c5890e36614d"}