This book integrates historical facts and literature, and uses a calm writing style to carefully outline the ups and downs of Tang Xuanzong's life. In the early days of his reign, Emperor Xuanzong of the Tang Dynasty was full of ambitions, far-sighted, and appointed talented people to create the "Kaiyuan Age" and push the Tang Dynasty's national power to its peak; in the later years, he indulged in leisure activities, failed to distinguish between loyal and traitors, and neglected government affairs, which triggered the "Anshi Rebellion". Under the raging war, the Tang Dynasty was devastated and its national power suffered heavy losses, turning from prosperity to decline. In his later years, Emperor Xuanzong of the Tang Dynasty was banned from the Ganlu Palace, and even his close confidant Gao Lishi was demoted. Finally, he ended his life in desolation and loneliness. His life experience serves as a warning to future generations: Even if the Tang Dynasty was a powerful nation and Xuanzong was unparalleled in military prowess, if one abandons his original intention, does not think about progress, and indulges in pleasure, he will inevitably be doomed to decline or even national subjugation, and his prosperity will eventually come to nothing.
