Once in the service of Later Qin (Houqin 後秦), the Xiongnu 匈奴 Helian Bobo 赫連勃勃 rebelled against this kingdom and made himself king and Great Chieftain (Da Shanyu 大單于) of Xia 夏. In the next decade, the kingdom of Northern Wei (Beiwei 北魏) advanced further to the south and finally took Chang'an 長安 (modern Xi'an) and killed Helian Ding 赫連定 when he wanted to cross the Yellow River east on his flight. The politics of Xia are often described as showing no initiation of any establishment of a civil administration, and Helian Bobo is said being a ruthless tyrant who destroyed any civilian institution. But in fact, we possess a coin casted by Helian Bobo so that we must assume that he was at least concerned about the basics of a civilian government. See also titles of rulers. Note: The rulers of the sideline dynasties are usually not called with their posthumous dynastic titles but with their personal names as they are not accepted as righteous rulers by official historiographies. Rulers of Xia 夏 (407-432) Capitals: Tongwan 統萬 (modern Nanbai Chengzi 南白城子 near Wushenqi 烏審旗/Inner Mongolia), Chang'an 長安 (modern Xi'an 西安/Shaanxi) Ethnicity: Xiongnu 匈奴 dynastic title {temple name} -----reign periods personal name Liu Weichen 劉衛辰 Xia Wuliedi 夏武烈帝 {Shizu 世祖} 407-425 -----Longsheng 龍升 (龍昇) 407-412 -----Fengxiang 鳳翔 413-417 -----Changwu 昌武 418 -----Zhenxing 真興 419-424 Helian Bobo 赫連勃勃 (Tiefu Qujie 鐵弗屈孑) The Deposed Ruler (Feizhu) 夏廢主, Prince of Qin 秦王 425-427 -----Yongguang 永光 425-427 Helian Chang 赫連昌 The Last Ruler (Houzhu) 夏後主, Prince of Pingkang 平康王 428-432 -----Shengguang 勝光 428-431 Helian Ding 赫連定 431 Xia conquered by Northern Liang 北涼.

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