17号DLC，Double XP。是不是XP系统的信息呢

GaoKAHN

ARCTIC STRIKE DLC AVAILABLE ON JULY 17TH AND DOUBLE XP

The first downloadable content pack for Ghost Recon Future Soldier will be available on July 17th for the Xbox 360 and PlayStation 3. In anticipation of the DLC and in appreciation of our enthusiastic community, we are enabling double XP beginning today and lasting until the DLC launches on the 17th.

来源于官方网站新闻