喀喇汗国
The Kutadgu Bilig or Qutadğu Bilig (; proposed Middle Turkic: ), is an 11th century work written by Yūsuf Balasaguni for the prince of Kashgar. The text reflects the author's and his society's beliefs, feelings and practices with regard to quite a few topics and depicts interesting facets of various aspects of life in the Kara-Khanid Khanate.