I researched a lot about this through "OPEN SOURCE" and a lot of news articles are pointing that PLA is actually inferior to IA in High altitude Warfare.
According to this "
SOURCE" a Chinese Military expert has said that Indian Army has the world's largest and most experienced plateau and mountain troops.
Here is "Link"
In the midst of the ongoing border standoff, the Indian Army won a rare public compliment from a Chinese military expert who said India has the world’s largest and experienced plateau and mountain troops equipped with some of the best weapons suited for such terrain in the Tibetan border.
www.firstpost.com
Coming to high altitude Warfare than we have some called the High Altitude Warfare School which iss a defence service training and research establishment of the Indian Army.
View attachment 156841View attachment 156842
Soliders from countries like US, UK, Germany, Russia etc come here for Training so if IA is giving high altitude Warfare training to soldiers of world class armies than we are definitely superior it PLA in this regard.