Xiongnu, the predecessor of Mongolia, originated from Wumeng Shiwei, a branch of Donghu, while the Wuhuan and Xianbei tribes to the east of Xiongnu were called Donghu, and the oasis people to the west of Xiongnu were called West Lake.
Xiongnu, a nomadic people, appeared in the 3rd century BC. According to Historical Records Biography of Xiongnu, Xiongnu is a descendant of Xia Houshi, also known as Chunwei.
The surname of Xia Houshi, the first hereditary dynasty in China, said that after the death of Xia Jie, the last king of the Xia Dynasty, Xun Yu, the son of Xia Jie, took Xia Jie's concubine as his own, and then fled to a desert land in the north for generations. This is the origin of the Huns.
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Xiongnu became strong in the early Western Han Dynasty, and repeatedly invaded the border, posing a strong threat to the regime of the Western Han Dynasty and taking control of the western regions until Emperor Han Yuan married Wang Zhaojun to Xiongnu Khan, so as to stabilize the border peace.
In the later period, there was unrest in the Xiongnu for the throne, and the Xiongnu was divided into north and south Xiongnu. The Han Dynasty took the opportunity to send the northern Xiongnu to Central Asia. The southern Xiongnu surrendered to the Han Dynasty and was placed in today's desert areas such as Qingyang, Ningxia, Shanxi, Shaanxi, northern Hebei, Hohhot, Inner Mongolia and Baotou.
With the passage of time, the southern Xiongnu was gradually sinicized, and Mongolia, Turkic and Qidan were all its descendants, which was also the reference of "Hulu" and "Xiongnu" in Yue Fei's poems.
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