In 1962, PLA had battle hardened soldiers who were pure infantry guys. PLA has now deployed one Mech div and one motorised infantry div. Both these Divs are incapable of fighting in mountains as they are fit to fight highly mobile warfare in plains. In mountains, it is basically infantry and arty who decide the outcome with Mech and Armour in supporting role. India has done its deployment in this exact manner. We have inducted close to one additional corps of soldiers to fight on the two fronts in Northern command. And these forces are composed in a manner which allows us to fight holding battles in the high mountains and also go into offensive in the plains of Aksai Hind.
You might be shocked to know that PLA troops travel in AC vehicles equipped with oxygen cylinders. Even their tents have direct oxygen supply to their beds. This is their condition and they want to fight IA.
Photo taken from @rajfortyseven. See the oxygen cylinder in their rec rooms. This is a PLA barrack in Tibet.
See the chink in the back - exercising with a heavy woolen hat on... that alone tells you this was a photo op pic.