This the fairly modern Chinese CS/LS2 – the 9mm Parabellum export model of the 5.8x21mm QCW-05 submachine gun. It takes most of its design cues form the QBZ-95 rifle, as you can see form the grip layout. It is a bullpup, with a right-ride ejection port that cannot be swapped. It is a bullpup style design, with the magazine behind the trigger, and it fires from an open bolt with both semiautomatic and full auto selector options.
The receiver is made of aluminum, contributing to a quite light gun. The bolt is also relatively light, resulting in a high cyclic rate and more felt recoil than many 9mm SMGs. The bolt is slamming into the rear of the receiver on each shot, which causes a lot of movement in the gun while shooting. The iron sights are a removable option on an integral pica tinny rail, which is a good thing – they are awful. The same minuscule rear aperture that the QBZ rifle has. The suppressor is not particularly efficient.
I have no prejudice against Chinese small arms – Chinese AKs were/are extremely well made. But this modern bullpup family is really pretty mediocre in all its forms.