Located on an island platform in Yar Township, about 13 kilometers west of Turpan City, the river flows around the city, so it is called Jiaohe. The existing building ruins are about 1650 meters long, narrow at both ends, and about 300 meters wide at the middle, showing a willow-shaped peninsula. Jiaohe Old City, built in the 2nd to 5th centuries B.C., is the former capital of Cheshi, one of the 36 ancient cities in the Western Regions. It is the political, economic, military and cultural center of the country. It is the largest, oldest and most well-preserved native building city in the world. It is also the most complete urban relic preserved in China for more than two thousand years. Anxi Capital, the highest military and political organization in the Western Regions of Tang Dynasty, was first established here. 。 In 1961, it was listed as a national key cultural relic protection unit. On June 22, 2014, at the 38th UNESCO World Heritage Committee meeting in Doha, Qatar, Jiaohe Old Town was successfully included in the World Heritage List as a site of the Silk Road: Road Network of Chang'an-Tianshan Corridor, which was jointly applied for by China, Kazakhstan and Kyrgyzstan.