{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"The key files that need to be backed up during the blockchain upgrade process are:","a":"The key  files that need to be backed up during the blockchain upgrade process include: block data, chain structure data, transaction data, consensus algorithm-related data, encryption keys, and private keys. These files are crucial for ensuring the security and stable operation of the blockchain system, so it is essential to ensure their backup during the upgrade process."}]}],"pr":"8be5b7761ee3889df2c2d4f1742a75420341f7bb757386098b865a31f927f420"}