Tibet Autonomous Region in the context of Tang–Tibet Treaty Inscription

Ladakh (English: /ləˈdɑːk/, Hindi: [ləd̪ːaːx]) is a region administered by India as a union territory and constitutes an eastern portion of the larger Kashmir region that has been the subject of a dispute between India and Pakistan since 1947 and India and China since 1959. Ladakh is bordered by the Tibet Autonomous Region to the east, the Indian state of Himachal Pradesh to the south, both the Indian-administered union territory of Jammu and Kashmir and the Pakistan-administered Gilgit-Baltistan to the west, and the southwest corner of Xinjiang across the Karakoram Pass in the far north. It extends from the Siachen Glacier in the Karakoram range to the north to the main Great Himalayas to the south. The eastern end, consisting of the uninhabited Aksai Chin plains, is claimed by the Indian Government as part of Ladakh, but has been under Chinese control.

In the past, Ladakh gained importance from its strategic location at the crossroads of important trade routes, but as Chinese authorities closed the borders between Tibet Autonomous Region and Ladakh in the 1960s, international trade dwindled. Since 1974, the Government of India has successfully encouraged tourism in Ladakh. As Ladakh is strategically important, the Indian military maintains a strong presence in the region.

Aksai Chin is a region administered by China partly in He'an County and Hekang County of Hotan Prefecture, Xinjiang, and partly in Rutog County of Ngari Prefecture, Tibet, and constituting the easternmost portion of the larger Kashmir region that has been the subject of a dispute between India and China since 1959. China administers the region and claims it as part of the Xinjiang and Tibet autonomous regions. India meanwhile claims it as part of Leh district in the union territory of Ladakh.

Nepal, officially the Federal Democratic Republic of Nepal, is a landlocked country in South Asia. It is mainly situated in the Himalayas, but also includes parts of the Indo-Gangetic Plain. It borders the Tibet Autonomous Region of China to the north, and India to the south, east, and west, while it is narrowly separated from Bangladesh by the Siliguri Corridor, and from Bhutan by the Indian state of Sikkim. Nepal has a diverse geography, including fertile plains, subalpine forested hills, and eight of the world's ten highest mountains, including Mount Everest, the highest point above mean sea level on Earth. Kathmandu is the nation's capital and its largest city. Nepal is a multi-ethnic, multi-lingual, multi-religious, and multi-cultural state, with Nepali as the official language.

The name "Nepal" is first recorded in texts from the Vedic period of the Indian subcontinent, the era in ancient Nepal when Hinduism was founded, the predominant religion of the country. In the middle of the first millennium BC, Gautama Buddha, the founder of Buddhism, was born in Lumbini in southern Nepal. Parts of northern Nepal were intertwined with the culture of Tibet. The centrally located Kathmandu Valley is intertwined with the culture of Indo-Aryans, and was the seat of the prosperous Newar confederacy known as Nepal Mandala. The Himalayan branch of the ancient Silk Road was dominated by the valley's traders. The cosmopolitan region developed distinct traditional art and architecture. By the 18th century, the Gorkha Kingdom achieved the unification of Nepal. The Shah dynasty established the Kingdom of Nepal and later formed an alliance with the British Empire, under its Rana dynasty of premiers. The country was never colonised but served as a buffer state between Imperial China and British India. Parliamentary democracy was introduced in 1951 but was twice suspended by Nepalese monarchs, in 1960 and 2005. The Nepalese Civil War in the 1990s and early 2000s resulted in the establishment of a secular republic in 2008, ending the world's last Hindu monarchy. The Constitution of Nepal, adopted in 2015, affirms the country as a federal parliamentary republic divided into seven provinces. In September 2025, protests against a social media ban and economic inequality caused riots, resulting in casualties and resignation of the prime minister.

The autonomous regions (Chinese: 自治区; pinyin: Zìzhìqū; lit. 'self-governing area') are one of the four types of province-level divisions in the People's Republic of China. Like provinces, an autonomous region has its own local government, but under the law of the People's Republic of China, an autonomous region has more legislative rights, such as the right to "formulate self-government regulations and other separate regulations." An autonomous region is the highest level of minority autonomous entity in China, which has a comparably higher population of a particular minority ethnic group.

There are five autonomous regions in China: Guangxi, Inner Mongolia (Nei Menggu), Ningxia, Tibet (Xizang), and Xinjiang.

Himachal Pradesh (Hindi: Himācal Pradeś, pronounced [ɦɪˈmäːtʃəl pɾəˈd̪eːʃ]; Sanskrit: himācāl prādes; lit. "Snow-laden Mountain Province") is a state in the northern part of India. Situated in the Western Himalayas, it is one of the 13 mountain states and is characterised by an extreme landscape featuring several peaks and extensive river systems. Himachal Pradesh is the northernmost state of India and shares borders with the union territories of Jammu and Kashmir and Ladakh to the north, and the states of Punjab to the west, Haryana to the southwest, Uttarakhand to the southeast and a very narrow border with Uttar Pradesh to the south. The state also shares an international border to the east with the Tibet Autonomous Region in China. Himachal Pradesh is also known as Dev Bhoomi, meaning 'Land of Gods' and Veer Bhoomi which means 'Land of the Brave'.

The predominantly mountainous region comprising the present-day Himachal Pradesh has been inhabited since pre-historic times, having witnessed multiple waves of human migrations from other areas. Through its history, the region was mostly ruled by local kingdoms, some of which accepted the suzerainty of larger empires. Prior to India's independence from the British, Himachal comprised the hilly regions of the Punjab Province of British India. After independence, many of the hilly territories were organised as the Chief Commissioner's province of Himachal Pradesh, which later became a Union Territory. In 1966, hilly areas of the neighbouring Punjab state were merged into Himachal and it was ultimately granted full statehood in 1971.

The Tanggula (Chinese: 唐古拉山, p Tánggǔlāshān, or 唐古拉山脉, p Tánggǔlāshānmài), Tangla, Tanglha, or Dangla Mountains (Tibetan: གདང་ལ་།, w Gdang La, z Dang La) is a mountain range in the central part of the Qinghai-Tibet Plateau in Tibet. Administratively, the range is in the Nagqu Prefecture of the Tibet Autonomous Region, with the central section extending into the Tanggula Town and the eastern section entering the Yushu Tibetan Autonomous Prefecture of Qinghai province.

Tanggula is the source of the Ulan Moron and Dam Qu Rivers, the geographic headwaters of the Yangtze River. It functions as a dividing range between the basin of the Yangtze in the north and the endorheic basin of northeastern Tibet in the south.

Xinjiang, officially the Xinjiang Uygur Autonomous Region (XUAR), is an autonomous region of the People's Republic of China (PRC), in the northwest of the country at the crossroads of Central Asia and East Asia. The largest province-level division of China by area and the 8th-largest country subdivision in the world, Xinjiang spans over 1.6 million square kilometres (620,000 sq mi) and has about 25 million inhabitants. Xinjiang borders the countries of Afghanistan, India, Kazakhstan, Kyrgyzstan, Mongolia, Pakistan, Russia, and Tajikistan. The rugged Karakoram, Kunlun, and Tian Shan mountain ranges occupy much of Xinjiang's borders, as well as its western and southern regions. The Aksai Chin and Trans-Karakoram Tract regions are claimed by India but administered by China. Xinjiang also borders the Tibet Autonomous Region and the provinces of Gansu and Qinghai. The best-known route of the historic Silk Road ran through the territory from the east to its northwestern border.

High mountain ranges divide Xinjiang into the Dzungarian Basin (Dzungaria) in the north and the Tarim Basin in the south. Only about 9.7% of Xinjiang's land area is fit for human habitation. It is home to a number of ethnic groups, including the Han Chinese, Hui, Kazakhs, Kyrgyz, Mongols, Russians, Sibe, Tajiks (Pamiris), Tibetans, and Uyghurs. There are more than a dozen autonomous prefectures and counties for minorities in Xinjiang. Many older English-language reference works call the area Chinese Turkestan, Chinese Turkistan, East Turkestan or East Turkistan.

The Tibetan Plateau, also known as the Qinghai–Tibet Plateau, Qingzang Plateau, or as the Himalayan Plateau, is a vast elevated plateau located at the intersection of Central, South, and East Asia. Geographically, it is located to the north of Himalayas and the Indian subcontinent, and to the south of Tarim Basin and Mongolian Plateau. Geopolitically, it covers most of the Tibet Autonomous Region, most of Qinghai, the western half of Sichuan, Southern Gansu provinces, southern Xinjiang province in Western China, Bhutan, the Indian regions of Ladakh and Lahaul and Spiti (Himachal Pradesh) as well as Gilgit-Baltistan in Pakistan, northwestern Nepal, eastern Tajikistan and southern Kyrgyzstan. It stretches approximately 1,000 kilometres (620 mi) north to south and 2,500 kilometres (1,600 mi) east to west. It is the world's highest and largest plateau above sea level, with an area of 2,500,000 square kilometres (970,000 sq mi). With an average elevation exceeding 4,500 metres (14,800 ft) and being surrounded by imposing mountain ranges that harbor the world's two highest summits, Mount Everest and K2, the Tibetan Plateau is often referred to as "the Roof of the World".

The Tibetan Plateau contains the headwaters of the drainage basins of most of the streams and rivers in surrounding regions. This includes the three longest rivers in Asia (the Yellow, Yangtze, and Mekong). Its tens of thousands of glaciers and other geographical and ecological features serve as a "water tower" storing water and maintaining flow. It is sometimes termed the Third Pole because its ice fields contain the largest reserve of fresh water outside the polar regions. The impact of climate change on the Tibetan Plateau is of ongoing scientific interest.

The Yarlung Tsangpo, also called Yarlung Zangbo (Tibetan: ཡར་ཀླུངས་གཙང་པོ་, Wylie: yar kLungs gTsang po, ZWPY: Yarlung Zangbo) and Yalu Zangbu River (Chinese: 雅鲁藏布江; pinyin: Yǎlǔzàngbù Jiāng) is a river that flows through the Tibet Autonomous Region of China and Arunachal Pradesh of India. It is the longest river of Tibet and the fifth longest in China. The upper section is also called Dangque Zangbu meaning "Horse River".

Originating from the Angsi Glacier in western Tibet, southeast of Mount Kailash and Lake Manasarovar, it later forms the South Tibet Valley and Yarlung Tsangpo Grand Canyon before passing into the state of Arunachal Pradesh in India. Downstream from Arunachal Pradesh, the river becomes far wider and is called the Siang. After reaching Assam, the river is known as the Brahmaputra.

The Brahmaputra is a trans-boundary river which flows through Southwestern China, Northeastern India, and Bangladesh. It is known as the Brahmaputra or Luit in Assamese, Yarlung Tsangpo in Tibetan, the Siang/Dihang River in Arunachali, and Jamuna River in East Bengal. By itself, it is the 9th largest river in the world by discharge, and the 15th longest.

It originates in the Manasarovar Lake region, near Mount Kailash, on the northern side of the Himalayas in Burang County of Tibet where it is known as the Yarlung Tsangpo River. The Brahmaputra flows along southern Tibet to break through the Himalayas in great gorges (including the Yarlung Tsangpo Grand Canyon) and into Arunachal Pradesh. It enters India near the village of Gelling in Arunachal Pradesh and flows southwest through the Assam Valley as the Brahmaputra and south through Bangladesh as the Jamuna (not to be confused with the Yamuna of India). In the vast Ganges Delta, it merges with the Ganges, popularly known as the Padma in Bangladesh, and becomes the Meghna and ultimately empties into the Bay of Bengal.

Mount Kailash (also Kailasa, Gang Tise and Gang Rinpoche or Kangrinboqê) is a mountain in Ngari Prefecture, Tibet Autonomous Region of China. It lies in the Gangdise Shan mountain range of the Transhimalaya, in the western part of the Tibetan Plateau. The peak of Mount Kailash is located at an elevation of 6,638 m (21,778 ft), near the western trijunction between China, India and Nepal.

Mount Kailash is located close to Manasarovar and Rakshastal lakes. The sources of four rivers: Indus, Sutlej, Brahmaputra, and Ghaghara lie in the vicinity of the region. Mount Kailash is sacred in Bon, Buddhism, Hinduism, and Jainism. People from China, India, Nepal, and other countries in the region undertake a pilgrimage to the mountain. The pilgrimage generally involves trekking towards Lake Manasarovar and a circumambulation of Mount Kailash.

The Dzungar Khanate (Mongolian: ᠵᠡᠭᠦᠨᠭᠠᠷ ᠣᠯᠣᠰ Зүүнгар Улс), also known as the Zunghar Khanate or Junggar Khanate, was a nomadic khanate of Oirat Mongol origin. At its greatest extent, it covered an area from southern Siberia in the north to present-day Kyrgyzstan in the south, and from present-day west of Mongolia and the Great Wall of China in the east to present-day Kazakhstan in the west. The core of the Dzungar Khanate is today part of northern Xinjiang, also called Dzungaria.

About 1620 the western Mongols, known as the Oirats, united in the Junggar Basin in Dzungaria. In 1678, Galdan received from the Dalai Lama the title of Boshogtu Khan, making the Dzungars the leading tribe within the Oirats. The Dzungar rulers used the title of Khong Tayiji, which translates into English as "crown prince". Between 1680 and 1688, the Dzungars conquered the Tarim Basin, which is now southern Xinjiang, and defeated the Khalkha Mongols to the east. In 1696, Galdan was defeated by the Qing dynasty and lost Outer Mongolia. In 1717, the Dzungars conquered Tibet, but were driven out in 1720 by the Qing. From 1755 to 1758, Qing China took advantage of a Dzungar civil war to conquer Dzungaria and killed 70–80% of the Dzungar population. The destruction of the Dzungars led to the Qing conquest of Mongolia, Tibet, and the creation of Xinjiang as a political administrative unit.

Western China (中国西部 or 华西) is the west of China. It consists of Southwestern China and Northwestern China. In the definition of the Chinese government, Western China covers six provinces (Sichuan, Guizhou, Yunnan, Shaanxi, Gansu, and Qinghai), three autonomous regions (Tibet, Ningxia, and Xinjiang), and one direct-administered municipality (Chongqing).

Sichuan, previously romanized as Szechwan or Szechuan, is a province in Southwestern China, occupying the Sichuan Basin and Tibetan Plateau—between the Jinsha River to the west, the Daba Mountains to the north, and the Yunnan–Guizhou Plateau to the south. Its capital city is Chengdu, and its population stands at 83 million. Sichuan neighbors Qinghai and Gansu to the north, Shaanxi and Chongqing to the east, Guizhou and Yunnan to the south, and Tibet to the west.

During antiquity, Sichuan was home to the kingdoms of Ba and Shu until their incorporation by the Qin. During the Three Kingdoms era (220–280), Liu Bei's state of Shu was based in Sichuan. The area was devastated in the 17th century by Zhang Xianzhong's rebellion and the area's subsequent Manchu conquest. However, the area recovered to become one of China's most productive by the 19th century. During World War II, Chongqing served as the temporary capital of the Republic of China, and was heavily bombed. It was one of the last mainland areas captured by the People's Liberation Army during the Chinese Civil War, and was divided into four parts from 1949 to 1952, with Chongqing restored two years later. It suffered gravely during the Great Chinese Famine (1959–1961) but remained China's most-populous province until Chongqing was again separated from it in 1997.

Arunachal Pradesh (/ərʊˌnɑːtʃəl prəˈdeɪʃ/; lit. 'Dawn-Lit Mountain Province') is a state in northeast India. It was known as the North-East Frontier Agency until 1972, after which it became a union territory under the name Arunachal Pradesh. It became a state on 20 February 1987. Itanagar is its capital and largest town.

It shares international borders with Bhutan in the west, Myanmar in the east, and a disputed 1,129 km border with China's Tibet Autonomous Region in the north at the McMahon Line. Arunachal Pradesh is claimed in its entirety by China as South Tibet as part of the Tibet Autonomous Region; China occupied some regions of Arunachal Pradesh in 1962 but later withdrew its forces.

Hotan Prefecture (see also § Etymology) is located in the Tarim Basin region of southwestern Xinjiang, China, bordering the Tibet Autonomous Region to the south and Union Territory of Ladakh and Gilgit-Baltistan to the west. The vast majority of the Aksai Chin region which is disputed between China and India is administered as part of Hotan Prefecture. The seat of Hotan Prefecture is Hotan and its largest county by population is Karakax County. The vast majority of the residents of the prefecture are Muslim Uyghurs and live around oases situated between the desolate Taklamakan Desert and Kunlun Mountains.

The region was the center of the ancient Iranian Saka Buddhist Kingdom of Khotan. Later, the region was part of the Kara-Khanid Khanate, followed by the Qara Khitai, Chagatai Khanate, Moghulistan and the Dzungar Khanate, which was conquered by the Qing dynasty of China. Hotan became part of Xinjiang under Qing rule. In the 1930s, the Khotan Emirate declared independence from China. The People's Liberation Army entered Hotan in 1949.

Rutog County (Tibetan: རུ་ཐོག་རྫོང་།, Chinese: 日土县) is a county in Ngari Prefecture, Tibet Autonomous Region, China. The county seat is the new Rutog Town, located some 1,140 km (710 mi) or 700 miles west-northwest of the Tibetan capital, Lhasa. Rutog County shares a border with India, which is disputed.

The county has a rich history of folk tales, myths, legends, proverbs and folk songs and has many caves, rock paintings and other relics. The Xinjiang-Tibet Highway runs through the Rutog County for 340 km (210 mi). The modern county established in March 1961 covers 74,500 km (28,800 sq mi). It has a very low population density with a population of just over 10,000.

Ngari Prefecture (Tibetan: མངའ་རིས་ས་ཁུལ།, Wylie: mnga' ris sa khul, ZWPY: ngari sakü) or Ali Prefecture (simplified Chinese: 阿里地区; traditional Chinese: 阿里地區; pinyin: Ālǐ Dìqū) is a prefecture of China's Tibet Autonomous Region covering Western Tibet, whose traditional name is Ngari Khorsum. Its administrative centre and largest settlement is the town of Shiquanhe. It is one of the least densely populated areas in the world, with 0.4 people per square kilometer (1.0 per square mile).

Tibetans (Tibetan: བོད་པ་, Wylie: bod pa, THL: bö pa) are an East Asian ethnic group native to Tibet. Their current population is estimated to be around 7.7 million. In addition to the majority living in the Tibet Autonomous Region of China, significant numbers of Tibetans live in the Chinese provinces of Gansu, Qinghai, Sichuan, and Yunnan, as well as in India, Nepal, Pakistan and Bhutan.

The Tibetic languages are a branch of the Tibeto-Burman language family. The traditional or mythological explanation of the Tibetan people's origin is that they are the descendants of the human Pha Trelgen Changchup Sempa and rock ogress Ma Drag Sinmo. It is thought that most of the Tibeto-Burman speakers in southwest China, including Tibetans, are direct descendants from the ancient Qiang people.