Zhenzhu Khan (inčü qağan, 真珠可汗) (died October 21, 645), personal name Yi'nan (夷男), full regal title Zhenzhupiqie Khan (真珠毗伽可汗), was a khan of Xueyantuo, under whom Xueyantuo rose from being a vassal of Eastern Tujue to a mighty khanate ruling over northern/central Asia. During his reign, Xueyantuo largely aligned with China's Tang Dynasty, even though the two states were at odds at times, with the most serious dispute involving Tang's attempt to reestablish Eastern Tujue as a vassal state under the Qilibi Khan Ashina Simo—an attempt that eventually failed due to frequent incursions by Yi'nan's army against Ashina Simo. Throughout Yi'nan's reign, Xueyantuo remained powerful despite Tang attempts to curb its power, but after Yi'nan's death, a succession dispute between his sons, Bazhuo and Yemang (曳莽), led to Bazhuo's killing of Yemang and subsequent internal unrest. Further, Bazhuo attacked Tang, resulting in a major Tang retaliation campaign that, along with a revolt by the Huige, led to Xueyantuo's destruction in 646.
Read more about Zhenzhu Khan: Prior To Tang's Capture of Ashina Duobi, Reign Over Former Eastern Tujue Territory