Lan Han, official of the Xianbei state Later Yan

Lan Han was an official and a consort kin of the Xianbei-led Chinese Later Yan dynasty, who killed the emperor Murong Bao in 398 and briefly usurped the throne before being killed by Murong Bao's son Murong Sheng.

The Xianbei were an ancient nomadic people that once resided in the eastern Eurasian steppes in what is today Mongolia, Inner Mongolia, and Northeastern China. The Xianbei were likely not of a single ethnicity, but rather a multilingual, multi-ethnic confederation consisting of mainly Proto-Mongols, and, to a minor degree, Tungusic and Turkic peoples. They originated from the Donghu people who splintered into the Wuhuan and Xianbei when they were defeated by the Xiongnu at the end of the third century BC. Following the split, the Xianbei people did not have direct contact with the Han dynasty, residing to the north of the Wuhuan. In the first century BC, the Xianbei began actively engaging in the struggle between the Han and Xiongnu, culminating in the Xianbei replacing the Xiongnu on the Mongolian Plateau.

Yan, known in historiography as the Later Yan, was a dynastic state of China ruled by the Xianbei people during the era of Sixteen Kingdoms.