{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the steps involved in upgrading a blockchain?","a":"Evaluation and Planning：Before the upgrade, the  existing blockchain system needs to be evaluated, and the problems and shortcomings analyzed. Then, an upgrade plan is developed based on the evaluation results, including the goals, technical selection, timeline, and expected results."}]}],"pr":"76f00876c4ab422baca1e4bb338b8fa69256e86b5accd606f42a4122937befef"}