Complex sentence: However, Kuchlug, a Naiman who usurped the throne of the Kara-Khitan Dynasty, instituted harsh policies on the Muslim populations under his suzerainty, nevertheless Kara-Khanid Muslim generals such as Muhammad Tai, who surrendered to Kuchlug were incorporated into his army.
Split into simpler sentences: However, Kuchlug, a Naiman who usurped the throne of the Kara-Khitan Dynasty, instituted harsh policies towards the Muslim populations under his suzerainty. Nevertheless, Kara-Khanid Muslim generals such as Muhammad Tai who surrendered to Kuchlug were incorporated into his army.