{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the potential problems in the process of blockchain upgrading?","a":"Technical challenges: During the upgrade process, technical bottlenecks may be  encountered, such as issues related to scalability, performance, and security, which may lead the blockchain system to be unable to meet the increasing demands of users."}]}],"pr":"207c17837fcb54afdb511c1f556064d30f8c92d1346af472d93a449e0079dd1a"}