The "Old History of the Tang" is a historical text that chronicles the history of the Tang Dynasty, which ruled China from 618 to 907 AD. Compiled during the Song Dynasty, it provides a detailed account of the political, social, and cultural aspects of the Tang era, highlighting significant events and figures. This work is part of the "Twenty-Four Histories," a collection of Chinese historical texts. It is known for its comprehensive records, including biographies of important individuals, such as emperors and scholars, and it serves as a vital resource for understanding the development of Chinese civilization during this influential period.