The new episode of Sherlock had 4.7 million views on Youku in 24 hours

"For millions of fans, the agonizing wait for the return of the hit detective show Sherlock is over. The BBC broadcast the first episode of the third season at 9pm (GMT) on Jan. 1. A few hours later, Sherlock hit the Chinese internet via Youku, China’s biggest online streaming site. In less than 24 hours, it’s gotten 4.72 million views"

Source:  Quartz, 3rd January 2014

Note:  It seems that this is a legal upload, not piracy