ok let's get it straight is china proper a political term or geographical term if it is a geographical term there is no way to include taiwan in china proper because tw is a island far from mainland if it is a political term there is a term used by qing empire called which means inland provinces here is the proof sorry it is the same link but a short while ago i didn't translate it right translation sometimes china only means the traditional area of china which means inland eighteen province it dosen't included mongolia tibet qinghai xinjiang manchuria and taiwan here i have to emphasize the word inland and that's why the qing officer didn't consider taiwan as part of the traditional area of china