The defender has to just hold on to the existing positions, which is on the foothills of himalayas. The attacker would have to break the resistance (after passing the critical himalayas - critical from logistics POV) and move forward.
India will not "Unilaterally and unconditionally" back off. You can mark this much. And what you say is only half the matter, the other party claim the area too, and hence it is a disputed area.
Edited my post. Apologies that it hurt you. Please be as touchy feely when pure people take cheap shots on other religions calling them pee drinkers and what not.
middle finger to this open mindedness. You need roads, but you don't need to own the roads. Nor you need to build roads on other's territory without their consent.