What is China's graetest desert?

The Gobi (Mongolian: Говь, Govi or Gov', "gravel-covered plain"; Chinese: 戈壁(沙漠) Gēbì (Shāmò)) is the largest desert region in Asia. It covers parts of northern and northwestern China, and of southern Mongolia. The desert basins of the Gobi are bounded by the Altai Mountains and the grasslands and steppes of Mongolia on the north, by the Tibetan Plateau to the southwest, and by the North China Plain to the southeast. The Gobi is made up of several distinct ecological and geographic regions based on variations in climate and topography. This desert is the fifth largest in the world.

Inner Mongolia: Badain Jaran Desert, Gobi Desert, Ordos Desert, and Tengger Desert.
Xinjiang: Dzoosotoyn Elisen Desert, Gurbantunggut Desert, Kumtag Desert, Lop Desert, and Taklamakan Desert.