Since Qin Shi Huang unified the world, the territorial map has officially had a basic concept, but the reign of the Qin State is very short, and the territory can only be said to be "four to" east to the East China Sea, west to Longxi, north to the Great Wall area, and south to the South China Sea. The area is only 3,546,900 square kilometers.
Whether it is the territory of the Qiang han, Sheng Tang, or Daming, it is difficult to compare with the more than 13 million square kilometers of the Qing Dynasty, Kangxi and Qianlong not only created the prosperity of the Qing Dynasty, but also conquered the western region, but due to the invasion of Western powers, the late Qing government signed various unequal treaties, of which Tsarist Russia occupied the territory the most.
But with the collapse of the Soviet Union in 1991 into 15 countries, the great Soviet Union was also divided, but there were not many countries that wanted to return Chinese territory, and Tajikistan was one of them.
Located between Afghanistan, Uzbekistan, Kyrgyzstan and China, tajikistan is an ancient people of Central Asia that was conquered by the Mongols in the 13th century and incorporated into the Khanate of Bukhara.
But since 1547, the Grand Duke ivan IV of the Muscovite principality was crowned king, the Russian Empire was born, Tsarist Russia also carried out colonial expansion everywhere, ambitious Russia has always been worried about the territory of China, many times sent troops to invade, in 1689, after the end of the Battle of Yaksa, the Qing and Russia signed the Treaty of Nebchu, the first demarcation of the Sino-Russian border.
However, Russia coveted the Pamir Plateau, and in 1890, Britain and Russia signed an agreement to send troops to occupy the Pamir together, and after Tsarist Russia seized 70,000 square kilometers of Xinjiang, in 1892 it occupied more than 20,000 square kilometers of land west of the Sarekol Ridge.
The Tajiks lived here, and they were incorporated into Russia together, but in 1917, the October Revolution in Russia was held, Soviet power was formally established, and Under its influence, Tajik also established the Tajik Autonomous Soviet Socialist Republic, but it belonged to the Uzbek Soviet Socialist Republic.
Until 1929, when it officially joined the Soviet Union, some areas of the Pamir were officially under the jurisdiction of Tajikistan, but with the collapse of the Soviet Union, Tajikistan declared independence, because the Pamir Plateau originally belonged to China, Tajikistan did not recognize Russia's legitimate rights.
Coupled with the fact that Tajikistan has just become independent and its geographical location is between four countries, the border between China and Tajikistan has begun to enter the renegotiation procedure, and in 1999, China and Tajikistan signed agreements such as the Agreement between the People's Republic of China and the Republic of Tajikistan on the State Border between China and Tajikistan.
Tajikistan officially returned a piece of territory at the foot of the Sarekol Ridge, an area of 1158 square kilometers, although there are still more than 10,000 territories that have not yet been returned, but our country also takes into account that Tajikistan's land area is only 140,000, if it is returned in its entirety, it is equivalent to losing one-seventh of the country's land, so from a practical point of view, our country has made concessions.