Thief Vs Hunter update will come on June 1
Download Links:
The password is 请于6月1日0点之后更新
Use 7zip for the password protected archives
You can get free stuff(scrolls etc.) on June 1,3,5,7,9. Here's the link
Also it will be 2x xp and 3x drop event
Note: I'm not sure if you can update your current version...you might have to reinstall the client, 175 patch and than this one to work.
Have fun.