This book is a treatise on the political, economic and cultural exchanges of the various tribes in the Western Regions from the 8th to the 10th century. The book consists of four chapters and five appendices: Chapter 1: Gelulu’s activities in the Western Regions after the mid-eighth century; Chapter 2: Uighur’s migration to the west and the activities of Turkic tribes in the Western Regions; Chapter 3: Gaochang Uighur’s activities in the eastern Tianshan The development of the region, the division of the Turkic-speaking tribes in the western Tianshan Mountains and the activities of the Satuq Bughra Khan in the fourth chapter, the study of the royal family of the Karakhan Dynasty in appendix 1, and the research on the family of the royal family of the Karakhan Dynasty in appendix 2. Supplement to the Lah Dictionary, Appendix 3: Comparison Table of Arabic and Persian Book Names, Appendix 4. Original Arabic Historical Materials, and Appendix 5. Arabic and Persian Transcription Instructions. The study of an Arabic document completed in the Tianshan area in the 13th century (Supplement to the Surahe Dictionary) is of great significance for understanding the local situation and understanding the history of the Western Regions.