{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the steps to upgrade the main network of a blockchain?","a":"Code development and review: According to the upgrade plan, developers need to modify and optimize the core code of the blockchain to ensure that the upgraded system can meet new requirements and performance indicators. During this process, strict code review is required to ensure code  quality and security."}]}],"pr":"149585da1c1ca16c1ac78b22f7e2a5a1318145f67818da947df05a44a2b38b9c"}