This was taken from main forums:
The current Closed Beta playtesting period will come to an end on Tuesday, September 2 at 10 a.m. PDT (1 p.m.for you East Coasters).
Gameplay will resume 4 hours later that very same day at 2 p.m. with the launch of Perfect World International's OPEN Beta.
This initial launch will open with 1 PVP server (Lost City) and 1 PVE server (Heaven's Tear).
Do keep in mind that all of your current progress and characters will be wiped at the end of the Closed beta period so enjoy this experience while you can. But fear not, with the launch of the Open beta all characters, stats and data are permanent components of your account for as long as you choose to play our game.