looks like the Standard issue Helmet has been modified with side rails and a NOD mount. There common for modern Western Helmets
This Ops Core Sentry model is a prime western example for comparison. The Rails on the side generally Accept M1913 rail interfaces like those found commonly on weapons like the M4 Carbine This allows mounting of Lasers, Flashlights and even cameras. But also note the Differences The Ear Flap on the Sentry and ACH is cut back compared to the PLA model and the Suspension on the western type seems better or at least that's how it looks on the second Trooper in the line His Chin is pointing to the Sky well his helmet lays flat means the helmet is loose and the brim is almost over his eyes. If they can fix that then it would be very interesting to see where they go next. In the US and UK the next generation of helmets have already been shown to include additional attachments including both ballistic visors an mandible creating a very "Master Chief" Appearance.
This is the Same Model of helmet but fitted with a ballistic visor and mandible.
This is the Revision Battleskin Cobra which has been seen sported by both US and British Army Troops as there intended future Combat helmet system
Perfect for use by Machine gun turret shooters and infantry in high threat AOR's.