Shaanxi (simplified Chinese: 陕西; traditional Chinese: 陝西; pinyin: Shǎnxī; Wade-Giles: Shan-hsi; Postal map spelling: Shensi) is a north-central province of the People's Republic of China, and includes portions of the Loess Plateau on the middle reaches of the Yellow River as well as the Qinling Mountains across the southern part of the province.
By regular Hanyu Pinyin rules, if tone marks are not written, both Shaanxi and the neighbouring province of Shanxi should be spelled "Shanxi"; the difference is in tone: Shānxī and Shǎnxī. To make the difference clear without tonal marks, the spelling "Shaanxi" was contrived (following the romanization system of Yuen Ren Chao) for the province of Shǎnxī, while "Shanxi" is used for the province of Shānxī. Shaanxi is the official spelling on Chinese Government's official web portal.
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