I tried to identify all those presented guns... Pardon my horrible English.
Upper line, hanging:
Submachine gun, probably named QCW-number, caliber 9x19 mm (variant of export CS/LS7)
Assault rifle with short barrel QBZ-192, caliber 5,8x42 mm
Assault rifle with long barrel QBZ-191, caliber 5,8x42 mm
Compact handgun QSZ-193, caliber 9x19 mm (completely new design)
Full-size handgun QSZ-92A, caliber 9x19 mm (upgrade of QSZ-92)
Suppressed variant of QSZ-92A, probably named QSW-number, caliber 9x19 mm
Lower line, standing:
Ultra-light machine gun QBB-191 or QJB-191, caliber 5,8x42 mm (derived from QBZ-191)
Squad light machine gun QJS-161, caliber 5,8x42 mm (probably inspired by FN Minimi)
General purpose machine gun QJY-201, caliber 7,62x51 mm (probably inspired by FN MAG)
Designated marksman rifle QBU-191 or QBV-191, caliber 5,8x42 mm (derived from QBZ-191)
Sniper rifle QBU-203, caliber 7,62x51 mm (probably derived from export CS/LR35)
Sniper rifle QBU-202, caliber 8,6x70 mm (probably derived from export CS/LR35)
Anti-material rifle QBU-201, caliber 12,7x108 mm (probably derived from export AMR-2)
Any comments and/or corrections welcome.