Or it could be a language issue. Africa speaks Portuguese, French, English, and local languages, more or less in that order. It doesn't speak Chinese. And while many Chinese speak English, there are far fewer Chinese managers with the time or the interest to learn yet another language. (Especially not Portuguese, which is one of the hardest Euro-based languages.)

Anyway - Africa will be developed after Asia is exhausted. It will take longer, but it will happen within a few decades.