Evrything can be fake.
The beer, whisky, cigarettes, food, all can be counterfeit.
Even the toilet paper in the KTV are fake. Wrapper says Kleenex, but feels like sandpaper.
After u wipe your shit with the toilet paper, they will probably take it to fake it as tea leaves and serve in dim sum eateries.
China is full of fake stuff.
Just be mentally prepared.
Most important, always buy your cigarettes from a reputable source. (this does not include China DFS)