Shaanxi (simplified Chinese: 陕西; traditional Chinese: 陝西; pinyin: Shǎnxī; Wade–Giles: Shan-hsi; Postal map spelling: Shensi) is a province of the People's Republic of China, officially part of the Northwest China region. It includes portions of the Loess Plateau on the middle reaches of the Yellow River in addition to the Qin Mountains (Qinling) across the southern part of this province. Shaanxi is the historical home, along with Gansu of the dialect of the Dungans, of the Hui people, who emigrated out of China to Central Asia.