Culture 11-12th century Karakhanid mausolea in Uzgen , Kyrgyzstan . It is perhaps because of the similarities between Kara-Khanid and Kara-Khoja cultures that during the Yuan and Ming periods former Kara-Khoja and Xixia lands were populated by converts to Islam indistinguishable from Chagatay and Timurid lands. These Turkic Muslims under Chinese