Ni Hao! Thinking of wearing a Chinese-themed costume? Why not go with something royal like the outfit of a Chinese emperor. If you're feeling a bit more humble, you could also try being a terracotta soldier.
There are many countries in Africa, and it is an extremely diverse continent, but when most people think of it, they imagine the noble tribes of West Africa.
You might consider wearing a cool tribal costume to pay tribute to these.
If you're looking for something that's a bit more North African, why not wear an ancient Egyptian costume, like the pharaohs of the distant past?
Like Africa, Europe is extremely diverse. You might try dressing in traditional German clothes and pass around some German beer. Perhaps you might prefer dressing like one of the Royal Guards in the UK.
There are lots of traditional and well known costumes to choose from. Do you love getting to know other cultures? Why not make it a project this Halloween to both learn about a new culture and put together a costume?