Mangnai, also known as Mang'ai, is a county-level city in the northwest of Qinghai Province, China, bordering Xinjiang to the north and west.

[6][7][8] It also produces oil, natural gas, celestite, and sodium sulfate.

[5] 17 different ethnic groups live in the city, including the Han Chinese, Mongols, Tibetans, the Hui, Salars, Monguors, Manchus, Dongxiangs, and Uighurs.

[4] The main touristic sites in Mangnai are:[5] In 2019, a camp meant to simulate conditions on the planet Mars opened in the town of Lenghu, which is primarily geared towards tourists.

[11] Mangnai is located strategically on one of the main transport corridors between Gansu and Xinjiang.