Question: Which empire stretching from the west end of the Great Wall of China to present-day Kazakhstan was founded by the Choros
Context: Mutianyu () is a section of the Great Wall of China located in Huairou County 70 km northeast of central Beijing.  The Mutianyu section of the Great Wall is connected with Jiankou in the west and Lianhuachi in the east.  As one of the best-preserved parts of the Great Wall, the Mutianyu section of the Great Wall used to serve as the northern barrier defending the capital and the imperial tombs. The Dzungar Khanate, also written as the Zunghar Khanate, was an Oirat khanate on the Eurasian Steppe.  It covered the area called Dzungaria and stretched from the west end of the Great Wall of China to present-day Kazakhstan, and from present-day Kyrgyzstan to southern Siberia.  Most of this area today is part of the Xinjiang autonomous region in China, Kazakhstan, and Kyrgyzstan.  The Dzungar Khanate was the last major nomadic empire left from the Mongol Empire. Jiayu Pass or    () is the first pass at the west end of the Great Wall of China, near the city of Jiayuguan in Gansu province.  Along with Juyong Pass and Shanhai Pass, it is one of the main passes of the Great Wall. "Walking Through the Great Wall of China" is a magic trick performed by the illusionist David Copperfield, in which he apparently enters the Great Wall of China from one side and emerges on the other side in front of a live audience on both sides of the wall and over it.  This illusion was performed in his ninth TV special "The Magic of David Copperfield VIII: Walking Through the Great Wall of China" (1986).  It is one of the illusions Copperfield performed only once in his career. The Ming Great Wall (明長城; "Ming changcheng"), built by the Ming dynasty (1368–1644), forms the most visible parts of the Great Wall of China today.  A comprehensive archaeological survey, using advanced technologies, has concluded that the Ming walls measure 8850 km from Jiayu Pass in the west to the sea in Shanhai Pass, then looping over to terminate in Manchuria at the Hushan Great Wall.  This is made up of 6259 km sections of actual wall, 359 km of trenches and 2232 km of natural defensive barriers such as hills and rivers. Choros or Tsoros (Mongolian: Цорос ) was the ruling clan of the Dzungars and Dörbet Oirat and once ruled the whole Four Oirat.  They founded the Dzungar Khanate in the 17th century.  Their chiefs reckoned their descent from a boy nourished by a sacred tree. The GW2.8TC is an engine developed and built by Great Wall Motor Company Ltd. in China with cooperation from Bosch.  It is a 4 stroke, common rail diesel engine that produces 70 kW at 3600 rpm.  It is used in the Great Wall Hover and the Great Wall Wingle.  It is also China’s first high-pressure common rail diesel engine. The Great Wall of Qi () is the oldest existing Great Wall in China.  Construction of the wall started in 685 BC (during the Spring and Autumn period) by the state of Qi, to defend itself against an invasion by the Kingdom of Chu.  The existing sections date back to 500 BC.  Construction ended during the Warring States period.  The wall stretches from the areas under the administration of the present-day city of Jinan to the present-day city of Qingdao across the territories of the present-day cities of Tai'an, Zibo, Laiwu, Weifang, Linyi, and Rizhao.  Its total length has been estimated at about 600 kilometers. Lady Meng Jiang or Meng Jiang Nü () is a Chinese tale, with many variations.  Later versions are set in the Qin dynasty, when Lady Meng Jiang's husband was pressed into service by imperial officials and sent as corvee labor to build the Great Wall of China.  Lady Meng Jiang heard nothing after his departure, so she set out to bring him winter clothes.  Unfortunately, by the time she reached the Great Wall, her husband had already died.  Hearing the bad news, she wept so bitterly that a part of the Great Wall collapsed, revealing his bones. The Great Wall of China is a series of fortifications made of stone, brick, tamped earth, wood, and other materials, generally built along an east-to-west line across the historical northern borders of China to protect the Chinese states and empires against the raids and invasions of the various nomadic groups of the Eurasian Steppe.  Several walls were being built as early as the 7th century BC; these, later joined together and made bigger and stronger, are now collectively referred to as the Great Wall.  Especially famous is the wall built 220–206 BC by Qin Shi Huang, the first Emperor of China.  Little of that wall remains.  Since then, the Great Wall has been rebuilt, maintained, and enhanced; the majority of the existing wall is from the Ming Dynasty (1368–1644).
Answer: Dzungar Khanate