Emperor Xuanzong of Tang, also known as Li Longji, was the seventh emperor of the Tang Dynasty in China, reigning from 712 to 756 AD. He is often regarded as one of the most effective and culturally vibrant rulers in Chinese history. His reign is marked by significant advancements in art, music, and literature, as well as the expansion of the empire's territory. Under Xuanzong's leadership, the Tang Dynasty experienced a golden age, characterized by economic prosperity and cultural flourishing. He implemented various reforms to improve governance and promote trade along the Silk Road. However, his later years were marred by the An Lushan Rebellion, which significantly weakened the dynasty.