1962 what is the source of the sino-Indian war? What happened in the end?

In the late Qing Dynasty, India was a British colony. By 19 13, China's domestic strength was too weak shortly after the end of the Qing Dynasty. At that time, British McMahon and Tibetan local representatives quietly cut away about 90,000 square kilometers of land in China (that is, southern Tibet, which is often said, belongs to the climate of tropical monsoon forest, and is different from Tibet in your impression, influenced by the warm and humid airflow in the Indian Ocean). However, at that time, the Beiyang regime and local representatives in Tibet,

Since the founding of People's Republic of China (PRC), the border conflicts between China and India have been constant. 1962, India repeatedly provoked, and China decided to fight back. As a result of the counterattack, China won the battle, but lost forever. Now southern Tibet has been actually controlled by India and permanently occupied. For those soldiers who sweat and bleed, I express my greatest respect. However, it must be said that the incompetence and shortsightedness of those in power at that time, especially a series of inexplicable actions, made the soldiers' victory with their lives go up in smoke, which is unique in the whole world history: for example, they gave up their pursuit when they clearly won, even returned India's weapons and voluntarily retreated, and talked about handing over rich southern Tibet. As a result, the Indian army was permanently stationed in southern Tibet after the defeat. I have to say that the generosity of the new China on the territorial issue is unbelievable. Today, I am excited about the Diaoyu Islands. I don't know that since the founding of New China, it is conservatively estimated that there are more than 200,000 square meters of lost territory, and most of them are not wasteland.

I don't want to say more, it's a little boring.