{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How is storage handled in a blockchain?","a":"The data  storage of blockchain nodes generally adopts specific databases, such as LevelDB, RocksDB, etc."}]}],"pr":"edc6f1cec37633028d76dd561e443d0183e558e3f5bd75c21b902183fc720706"}