* Dimples are a genetic trait. Like any other genetic trait, they can occur in people of all ethnicities and backgrounds.
* There's no definitive data on dimple prevalence in any population. It's not something researchers typically study.
* Perception can be subjective. What one person considers a "dimple" another might not.
In short, there's no correlation between having dimples and being Chinese. Just like any other population group, Chinese people have a range of physical features, including the presence or absence of dimples.