Juqu Mengxun
In 429, Juqu Mengxun launched another major attack on Western Qin, but during the campaign, Juqu Xingguo was captured, and Juqu Mengxun was forced to withdraw, after his forces, aligned also with Tuyuhun forces commanded by Murong Muliyan (慕容慕利延), the brother of the khan Murong Mugui (慕容慕璝). He soon sent a large amount of grain to Qifu Mumo, requesting to ransom Juqu Xingguo, but Qifu Mumo refused, so Juqu Mengxun created Juqu Xingguo's younger brother, by the same mother, Juqu Puti (沮渠菩提), to be heir apparent. (Qifu Mumo kept Juqu Xingguo as an official and married a sister to him.)