{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the procedure for upgrading a blockchain?","a":"Code Review: During the development process,  technical personnel need to conduct a strict review of the upgrade code to ensure the security and stability of the upgrade plan. This step is crucial for"}]}],"pr":"75f019f2d9c58508f1f0f010468615c141390a3f79616b76b52e5054033c7187"}