Maybe I'm just ignorant here but the way I thought it'd go, is that since something like the VHS-2 & QBZ are both 5.56x45mm NATO, like it's M16 counterpart, they would have tracer rounds, but as they stand, they don't.
Below is pictures comparing the QBZ & M16A4. Notice the lack of ammo category. Is this intended, and if so, could we get an explanation why or perhaps a change on that stance? As commander I prefer to try direct fire if possible with tracers, plus they just look cool.