Taiwan flag show off in public

I don't know how to get a Taiwan flag, but somehow I want to get one recently.
Then I can use it to cheer for Taiwan team in international games.
So I think I need a big one that I can use it to cover my body.
How to get a Taiwan flag, I will google it, but it seems it will be not too easy.
Though I can get an image for now,








But... It will be sensitive? It's weird, actually it's weird from start to finish.