The entire Sino-Indian border is 1,700 kilometers long and is divided into three sections: eastern, central and western. There are disputed territories on every stretch of the border, especially in southern Tibet, which has been China's inherent territory since ancient times, and is located on the southern side of the Himalayas, in the southeast of the ** autonomous region of the People's Republic of China, Shannan and Nyingchi.
Beautiful scenery of southern Tibet. 
Beautiful southern Tibet.
Southern Tibet was illegally occupied
On July 3, 1914, McMahon and Shaza signed the Treaty of Simla, and at the same time concocted the infamous "McMahon Line", which has long belonged to historyChina's territory of more than 90,000 square kilometersAt that time, the Chinese representative Chen Yifan issued a statement on the spot: The treaty was signed by the British and Tibetan sides, and China could not recognize it.
However, in the era of hegemony, China was weak, and even if it did not agree, invalid treaties were enforcedAs a result, the de facto control border between China and India was unreasonably moved 60 miles north.
McMahon Line.
In 1948, while China was busy with the civil war and had no time to take care of the frontier, the newly independent India began to send troops into the Menyu area, and on February 2, 1951, the Indian army occupied Tawang, the central city of Menyu, and expelled the administrative personnel sent by the ** authorities to the local area by force, and our city further fell.
In 1954, India** established a pseudo-"Northeast Frontier Special Zone" in the region, and revised the official map to change the "McMahon Line" that China refused to recognize from the original "undemarcated boundary" to "demarcated" for the first time. By 1960, the Indian army had completely controlled the Menyu-Luoyu-Xiachayu area south of the wheat line, which belonged to China, and a large area of Chinese territory had fallen.
On March 22, 1959, when the rebellion had just broken out, Indian Prime Minister Jawaharlal Nehru wrote a letter to ***, saying that the Sino-Indian border had long been determined, and formally put forward a large territorial claim to China. After that, a note was sent to China**.
In the eastern section, India has identified the McMahon Line as a border line, covering an area of about 90,000 square kilometers, which has never been recognized by New China. In the middle sector, India occupies nine territories belonging to China, covering an area of about 2,000 square kilometers. In the western sector, they occupy 330,000 square kilometers of Chinese territory. India accounts for about 12 percent of the illegal occupation of ChinaMore than 50,000 square kilometers.
Belligerent India will perish.
Beginning in August 1959, India continued to manufacture border pieces. In the first half of 1962 alone, India established 24 bases in the eastern sector and even built outposts in the rear of the Chinese border guards.
How much territory India has encroached on China, how much has we recovered
China most of the time,In the middle section, India occupies nine territories belonging to China, covering an area of about 2,000 square kilometers. In the western sector, they occupy 330,000 square kilometers of Chinese territory. 。With the addition of the "wheat line", India has actually illegally occupied China.12More than 50,000 square kilometers of territory.
After the Sino-Indian border war in October-November 1962,Our China won a quick victory, recovering most of southern Tibet, including Tawang, Bomdila, Mechuka, Wanong and other important towns, and advancing near the traditional customary line. Later, for a variety of reasons, the squadron took the initiative to retreat to within the McMahon line. In 1964, the Indian army reoccupied the area and resumed a standoff with the squadron near the "wheat line".
Self-defense war on the Indian border.
In 1972, India changed the "Northeast Frontier Special Region" to the "Arunachal Territory". In February 1987, India declared the so-called "Arunachal Pradesh". The Chinese side has solemnly stated on many occasions that it does not recognize the illegal "wheat line" and "Abang" and demanded that India withdraw all military personnel who have crossed the line and set up points.
At present, about 90,000 square kilometers of disputed territory in southern Tibet are occupied by India. The Line of Actual Control between China and India is the illegal "McMahon Line". The map of India has made it its official, legal border, and in 1987 it declared the so-called "Arunachal Pradesh", along with a large number of migrants to the regionIn fact, about 30,000 square kilometers of territory have been recovered, and more than 90,000 square kilometers have not yet been recovered.
Toponymic distribution map.