Popova I. Tang Political Treatise from Dunhuang: “Heavenly Instructions” (Tian xun) // Studies in Chinese Manuscripts from the Warring States Period to the 20th Century. Ed. by Imre Galambos. Budapest: Institute of East Asian Studies, Eötvös Loránd University, 2013. P. 59—79. (Buddhist Monographs Asian Series, Series Editor Imre Hamar.)
In 1937, the eminent Chinese scholar Wang Zhongmin 王重民 (1903—1975) found in the Pelliot Collection of the Bibliothèque nationale de France an untitled fragment of a Chinese work bearing the pressmark P.5523. He tentively identified the work as the family admonition of the Tang Emperor Gaozong 高宗 (650–683) entitled “Heavenly Instructions” (Tian xun 天訓) that had long been considered lost.