The revitalization of the Tang Dynasty began with the Ganlu Incident.

In such an era, there are no loyal ministers. On his first day as the emperor, Li Ang summarized his first survival rule. ...A young man from the new century opened his eyes and became Emperor Wenzong Li Ang, the Tang Dynasty's Wenzong Emperor, a figure considered the dividing line of the late Tang Dynasty. An hour later, the historically famous Ganlu Incident was about to unfold. Surrounded by a group of ruthless eunuchs, before him stood incompetent and weak ministers. Under the swords of the Shence Army, heads rolled in the Secretariat and the Chancellery, and the emperor was imprisoned deep within the palace. The once glorious Tang Dynasty, which looked down upon all nations, was about to fall completely into the hands of eunuchs, until it met the tragic fate of the Five Dynasties and Ten Kingdoms. Helpless, Li Ang had no choice but to take matters into his own hands. However, when the head of the chief eunuch Qiu Shiliang was placed on the imperial desk, Li Ang suddenly realized that everything seemed to have just begun. Servants betrayed him, confidants were disloyal. Factional struggles raged within the court, and regional warlords had been entrenched for a century. The Tibetans and Uyghurs were eyeing us covetously, and even the small kingdom of Nanzhao dared to occasionally trespass. From some unknown time, this once magnificent, nine-tiered palace, known as the Heavenly Tang, was already crumbling, its structure eroded by countless termites. …On the first day of this transformation, I merely executed two eunuchs. Years later, Emperor Li Ang, who had regained the title of Heavenly Khan, wrote these words in his memoirs.