This may not have been released in China, but it was released in Taiwan...which China considers a part of itself, when convenient...
I happened to be in Taipei in Jan. 2015 for this film's local red carpet premiere. Hemsworth and Mann didn't see fit to show, but the evening was attended by Chinese-born Tang Wei, who was infamously "banned from acting"/blacklisted for a few years by the Chinese government after her appearance in Ang Lee's Lust, Caution (2007).
Tang Wei had also just married a South Korean film director in 2014...I'm guessing that didn't help the Chinese government's perception of her...or Blackhat. ;-)