I'm honestly curious as to why India feels accepting Chinese sovereignty over Tibet is a 'favor' that India did to China. India never had much in the way of political responsibilities to Tibet, even while Tibet was nominally independent - any such responsibilities were carried out by the British Viceroy.
Second, the Indo-Tibetan border was drawn up by the British; on the issue at hand, India has inherited Britain's position, and China has inherited Tibet's position. From a normative perspective, why should China accept the land?
If the reason is simply that India has done China a 'favor' by accepting Tibet, that's a patent non-starter - China could just as easily retort that China has done India a 'favor' by accepting Indian rule over Kashmir and the Indian liberation of Bangladesh.
If, however, the reason is that the border makes sense from some established principle of international law, then China could accept that. Contrary to what many DFIers here think, China is pretty interested in adhering to international rules and norms, since those rules and norms have helped make China rich over the past thirty years.
Don't be so honest. Every one knows tibet is not chinese territory in the immediate historic past.
If it was so then Why did Tibetian authorities sign the accord which led to the indo-Tibet border, the
MAC MOHAN line'
(Not India -china border)with the then british,
It is not for nothing it was called indo-Tibetian border. And British enjoyed suzernity over tibet with no armed resistance, meaning there was no chinese presence in tibet for centuries.
the chinese officials also participated in the talks but cleverly didn't sign the accord , fearing historical proof of the independance of Tibet.They just waked out at the last minute.
At that time Chinese were not the ruling authority in tibet,If they were then, what is the need for peaceful liberation of Tibet? and invasion by chinese army? killing and looting in tibet, which led to fleeing of dalailama.
By the same token If India is unfair in claiming british position, keep in mind most of the claims which are being made by chinese in all borders of with the neighbours are infact with china when the mangolian rulers ruled china after subjugating it.
So china too is infact claiming the areas which were part of a nation when the mangolians ruled in China.
if you advance the claim on tibet based on some obscure chinese occupation of Tibet centuries ago. india can claim pakistan, bangladesh, and even some areas in afganistan, following the same logic of Maurian empires.
So don't be so diplomatic.