The geography history book "The Tale of the Western Regions in Datang" is also called the Tale of the Western Regions, with the volume number 12. Xuanzang wrote an essay with a debating machine.

This book was written by Xuanzang on the orders of Emperor Taizong. Written in 646, the twentieth year of Zhenguan. The book summarizes Xuanzang's journey to the west from the first year of Zhenguan (three years of Zhenguan) to the nineteenth year of Zhenguan. This paper describes the general situation of Xuanzang 1 10 city-state, region and country, including territory, climate, mountains and rivers, customs, human feelings, language, religion, Buddhist temples and a large number of historical legends and fairy tales.

This book is a valuable material for studying the history, geography, religion, culture and communication between China and the West in Central Asia and South Asia in the Middle Ages, and it is also an important document for studying Buddhist history and Buddhist cultural relics.