This isn't unique to China, or to Israel and Palestine. There's also Ukraine and Russia, Armenia and Azerbaijan, Cambodia and Thailand, India and Pakistan, and

This isn't unique to China, or to Israel and Palestine. There's also Ukraine and Russia, Armenia and Azerbaijan, Cambodia and Thailand, India and Pakistan, and a whole swathe of territorial claims in other places. Borders, especially when not naturally delineated by something like a river, are messy things.