{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What files are required for backing up the blockchain version upgrade, including the backup files and data required?","a":"The backup files and data required for upgrading the blockchain version include: original blockchain data files, block index files, transaction data files, state  database, configuration files, contract code files, and compiled smart contract bytecode files. These files need to be properly backed up to ensure smooth progress during the version upgrade process and to recover data in case of problems."}]}],"pr":"2f8ec367ae301f0ef89ad913584117f4cd963c3e84059997d030b0c0708b47a1"}