{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the ways to store blockchain data?","a":"Off-chain storage: Off-chain storage refers to the storage of blockchain data in independent distributed databases, such  as LevelDB, RocksDB, MySQL, etc. This storage method is more friendly to blockchain nodes through a specific data access model, while reducing the disk space required for storage."}]}],"pr":"0d24957dec47d6fb69dff6beac0cdbb8f75ef62c8c26787078da579d5e7565da"}