Introduction to Tengger Desert: Tengger Desert is the fourth largest desert in China. Tengger means sky in Mongolian, which means the vast quicksand is like the boundless sky. Inside the desert, sand dunes, lake basins, salt marshes, grass shoals, mountains and plains are staggered, of which 71% are sand dunes, 7% of which are fixed or semi-fixed sand dunes. There are 422 large and small lake basins in the desert, of which 251 have accumulated water. They are mainly for spring water supply and temporary water collection. Most of them are residual lakes from the Tertiary Period and are the main settlement areas for residents.