'North India', 'Nepal' and the like are reasonably clear locations based on modern states but China and Tibet's relationship to it is less clear in what you say

'North India', 'Nepal' and the like are reasonably clear locations based on modern states but China and Tibet's relationship to it is less clear in what you say, both for its current status (let's not forget most of historic Tibet is not in the Tibetan Autonomous Region) and history of shifting borders and smaller states.