submitted to the Chinese. Huhanye used Chinese support to weaken Zhizhi, who gradually moved west. In 49 BC, a brother to Tuqi set himself up as Chanyu and was killed by Zhizhi. In 36 BC, Zhizhi was killed by a Chinese army while trying to establish a new kingdom in the far west near Lake Balkhash. Tributary relations with the Han In 53 BC Huhanye (呼韓邪) decided to enter into tributary relations with Han China. The original terms insisted on by the Han court were that, first, the Chanyu or his representatives should come to the capital to pay homage; secondly, the Chanyu should send a hostage prince; and thirdly, the Chanyu should present tribute to the Han emperor. The political status of the Xiongnu in the Chinese world order was reduced from that of a "brotherly state" to that of an "outer vassal" (外臣). During this period, however, the Xiongnu maintained political sovereignty and full territorial integrity. The Great Wall of China continued to serve as the line of demarcation between Han and Xiongnu. Huhanye sent his son, the "wise king of the right" Shuloujutang, to the Han court as hostage. In 51 BC he personally visited Chang'an to pay homage to the emperor on the Lunar New Year. In the same year, another envoy Qijushan (稽居狦) was received at the Ganquan Palace in the north-west of modern Shanxi. On the financial side, Huhanye was amply rewarded in large quantities of gold, cash, clothes, silk, horses and grain for his participation. Huhanye made two further homage trips, in 49 BC and 33 BC; with each one the imperial gifts were increased. On the last trip, Huhanye took the opportunity to ask to be allowed to become an imperial son-in-law. As a sign of the decline in the political status of the Xiongnu, Emperor Yuan refused, giving him instead five ladies-in-waiting. One of them was Wang Zhaojun, famed in Chinese folklore as one of the Four Beauties. When Zhizhi learned of his brother's submission, he also sent a son to the Han court as hostage in 53 BC. Then twice, in 51 BC and 50 BC, he sent envoys to the Han court with tribute. But having failed to pay homage personally, he was never admitted to the tributary system. In 36 BC, a junior officer named Chen Tang, with the help of Gan Yanshou, protector-general of the Western Regions,