Trollface is trolling.
Secret and proprietary information is usually very closely guarded. Even if they did get hacked, I would expect them to not have lost a single day simply because I'm sure they have backups. Also, hackers now days are interested in copying the information, not necessarily deleting it.
EDIT: also, looks like the guy is talking about their integration with Chinaside, which sounds to me more like an issue with The9, who may well indeed have been hacked, but I don't see how that could possibly damage the actual game.