[user5994461]

Nobody is competing globally. If you're Chinese (or wherever) you can only work legally in a few places in the world and you won't be treated as well as the locals (lower compensation too). Moving abroad also means abandoning your friends and family and culture and inheritance, with financial and non financial effects.

Working in an high costs of living area for a few years -if at all possible- is of course a viable strategy to save some money before going back home.