Original: http://dota2.sgamer.com/news/201301/148669.html

A document that Sgamer has confirmed indeed came from Perfect World internal announcement announces a company-wide pre-beta tournament for employees, with the tournament itself ending on March 21, 2013. Sgamer theorizes that this is a tournament to both help employees become familiar with Dota2, and to run some early tests of the servers themselves, with the Chinese server beta to go live shortly after this date.

The document also recommends employees to form teams based on existing work units as opposed to recruiting freely, so as to avoid poaching good Dota players from each other and causing internal strife.