"Believe it or not, I am not the skin colour of choice. I find the industry is getting more competitive, for foreign labour that is, with greater amounts of students able to afford education with the rapidly growing Chinese economy, and in parallel, rapidly expanding schools."

Sorry, if I seem a little dense. Are you saying that foreign teachers are facing more competition among themselves, or that the schools are competing among each other for the services of foreign teachers?

I'm also curious as to what you mean by not being the "skin colour of choice".