I used to work in the Marketing department for a Education Institution, we had to white washed our marketing materials by removing dark skin students and replaced it with white students if it were to send to certain countries in Asia. I hated it, because is racist and it is a false representation of the diversity in the campus. Glad I left!
My experience working with the region tells me that they will prefer white> Local

that is also the reason why many of the local ads in Asia will use mixed race models because many of them still view fair skin as the superior one
I probably didn’t explain this eloquently enough