Tacheng (Qoqek/Sawesek) or Chöchek is a county-level city (1994 est. pop. 56,400) and the administrative seat of Tacheng Prefecture , in northern Ili Kazakh Autonomous Prefecture , Xinjiang , one of the autonomous regions of China . The city was sometimes called Tarbaghatay or Tarbagatai (Mongolian: 'having marmots ') and was once known in European languages as Chuguchak (based on its name in the Mongolian language ). The current Uyghur name is Qöqäk Xä?ri. It is located in the Dzungarian Basin , some 10 km (6.2 mi) from the Chinese border with Kazakhstan . For a long time it has been a major center for trade with Central Asia because it is an agricultural hub. Its industries include food processing, textiles, and utilities. The city suffered harshly in 1865, during the fighting between the Qing forces and the Dungan and Uyghur rebels . Border crossing The Bakhtu border crossing into Kazakhstan is located 17 km (11 mi) from Tacheng. The checkpoint on the Kazakh side of the border is also known as Bak Express yourself. Organize your knowledge. Expand your mind. Discover the world. Revolvy connects you with interesting topics, lists and quizzes. Choose from hundreds of quizzes that test your knowledge. Search through millions of topics. Create a your personalized library of topics, and discover topics that others are following.