How do you know it’s really open beta? Because there’s new content to go along with it, naturally. And this is very new content, a new dungeon which roughly translates as the Court of Feasts complete with Chinese decorations and a soundtrack provided by local musicians. There are four bosses in the dungeon, although players outside of China shouldn’t expect to see the dungeon in other clients in the near future (or ever). Which means you’ll have to choose between learning Chinese or never seeing the content if that’s a big deal for you.