in 50 AD, the Southern Xiongnu submitted to tributary relations with Han China. The system of tribute was considerably tightened by the Han, to keep the Southern Xiongnu under control. The chanyu was ordered to establish his court in the Meiji district of Xihe Commandery and the Southern Xiongnu were resettled in eight frontier commanderies. At the same time, large numbers of Chinese were also resettled in these commanderies, in mixed Han-Xiongnu settlements. Economically, the Southern Xiongnu became reliant on trade with the Han. Tensions were evident between Han settlers and practitioners of the nomadic way of life. Thus, in 94, Anguo Chanyu joined forces with newly subjugated Xiongnu from the north and started a large scale rebellion against the Han. During the late 2nd century AD, the southern Xiongnu were drawn into the rebellions then plaguing the Han court. In 188, the chanyu was murdered by some of his own subjects for agreeing to send troops to help the Han suppress a rebellion in Hebei—many of the Xiongnu feared that it would set a precedent for unending military service to the Han court. The murdered chanyu's son Yufuluo, entitled Chizhisizhu (), succeeded him, but was then overthrown by the same rebellious faction in 189. He travelled to Luoyang (the Han capital) to seek aid from the Han court, but at this time the Han court was in disorder from the clash between Grand General He Jin and the eunuchs, and the intervention of the warlord Dong Zhuo. The chanyu had no choice but to settle down with his followers in Pingyang, a city in Shanxi. In 195, he died and was succeeded as chanyu by his brother Huchuquan Chanyu. In 215–216 AD, the warlord-statesman Cao Cao detained Huchuquan Chanyu in the city of Ye, and divided his followers in Shanxi into five divisions: left, right, south, north and centre. This was aimed at preventing the exiled Xiongnu in Shanxi from engaging in rebellion, and also allowed Cao Cao to use the Xiongnu as auxiliaries in his cavalry. Later the Xiongnu aristocracy in Shanxi changed their surname from Luanti to Liu for prestige reasons, claiming that they were related to the Han imperial clan through the old intermarriage policy. After Huchuquan, the Southern Xiongnu were partitioned into five local tribes. Each local chief was under the "surveillance of a chinese resident", while the shanyu was in "semicaptivity at the imperial