That is a very disputed part of the world , and if you actually read the agreements and treaties over the years, then read the histories, then you'll get a idea how confusing it is, heck technically California belongs to a dead guy, New Mexico and Texas either belongs to Spain , the native Americans, the u.s or perhaps mexico. Taiwan either is or isn't part of china.blahblahblah, in most land conflicts the original owners are long dead, but people are still claiming them for such and such reasons. People make lines and argue over them, sometimes rightfully and sometimes less so.