Later Han Empire (947-979) - the Last Empire of Shatuo in China by A. G. Nesterov

“…It is reported that the Empire of Later Han recognized the dependence of the Khitan Liao Empire; the Northern Han Empire existed in the region of Taiyuan exclusively with the support of the Khitan, who protected it from the Later Zhou and Song, sequentially successive empires on the Central plain of China. …”
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