The Dongxiang people (autonym: Sarta or Santa (撒尔塔); simplified Chinese: 东乡族; traditional Chinese: 東鄉族; pinyin: Dōngxiāngzú) are one of 56 ethnic groups officially recognized by the People's Republic of China. Most of the Dongxiang live in the Linxia Hui Autonomous Prefecture and surrounding areas of Gansu Province in northwestern China, while others groupings can also be found in Xinjiang Uyghur Autonomous Region, Qinghai Province, and Ningxia Hui Autonomous Region. According to the 2000 census, their population numbers 513,805.

The Dongxiang are closely related to the Mongolians. Scholars speculate that their identity as an independent ethnic group arose through contact with Central Asians, due to whom the Dongxiang converted to Sunni Islam in the 13th century.

One possible origin is that they are descendants of Mongolian troops posted in the Hezhou area by Genghis Khan (1162-1227 AD) during his journey westward, while another possibility is that they could be a mixture of many peoples including Mongolian, Han, and Tibetan groups.

Don Juan (Spanish, or "Don Giovanni" in Italian) is a legendary, fictional libertine whose story has been told many times by many authors. El burlador de Sevilla y convidado de piedra (The Trickster of Seville and the Stone Guest) by Tirso de Molina is a play set in the fourteenth century that was published in Spain around 1630. Evidence suggests it is the first written version of the Don Juan legend. Among the best known works about this character today are Molière's play Dom Juan ou le Festin de pierre (1665), Byron's epic poem Don Juan (1821), José de Espronceda's poem El estudiante de Salamanca (1840) and José Zorrilla's play Don Juan Tenorio (1844). Along with Zorrilla's work (still performed every year on November 2nd throughout the Spanish-speaking world), arguably the best known version is Don Giovanni, an opera composed by Wolfgang Amadeus Mozart with libretto by Lorenzo da Ponte, first performed in Prague in 1787 (with Giacomo Casanova probably in the audience) and itself the source of inspiration for works by E. T. A. Hoffmann, Alexander Pushkin, Søren Kierkegaard, George Bernard Shaw and Albert Camus.

The Daur people (simplified Chinese: 达斡尔族; traditional Chinese: 達斡爾族; pinyin: Dáwò'ěr zú; the former name "Dahur" is considered derogatory^{[citation needed]}) are a Mongolic-speaking sub-ethnic group. They form one of the 56 ethnic groups officially recognized in the People's Republic of China. They numbered 132,394 according to the latest census (2000), and most of them live in the Morin Dawa Daur Autonomous Banner (Mòlì Dáwǎ Dáwò'ěrzú Zìzhìqí 莫力達瓦達斡爾族自治旗/莫力达瓦达斡尔族自治旗) in Hulun Buir, Inner Mongolia autonomous region of China. There are also some near Tacheng in Xinjiang, where their ancestors were moved during the Qing Dynasty.

Daur is a Mongolic language. There is no written standard, although a Pinyin-based orthography has been devised by the native Daur scholar Merden Enhebatu. The Daur language retains some Khitan substratal features, including a number of lexemes not found in other Mongolic languages. It is made up of three dialects: Bataxan, Hailar, Qiqihar.

Genetically, the Daurs are descendants of the Khitan, as recent DNA analyses have proven. In the Qianlong Emperor's "钦定《辽金元三史语解》" he retranslates "大贺", a Khitan clan described in 《辽史》, as "达呼尔". That's the earliest theory claim Daurs are descendants of Khitans.