Previous operator The9 had been replaced by Activision Blizzard with NetEase since June 7th, and since then, players have been unable to connect online. What seems to be the problem? See, in China, launches are not as simple as staging an event and making sure everyone goes home with cool swag bags. They need government approvals and licenses. A lot of them.
NetEase has released an official statement on the matter, saying that:
We have met with some factors which are out of control [and] the servers' reopening will be delayed. As of now, we don't have a specific reopening timeframe.