Modern military intelligence analyst Li Kehun became the concubine of Longyou Jiedushi during the Tianbao period. Faced with Tibetan pressure, shortage of military supplies, and family strife, he relied on his advanced knowledge to reorganize the border army, promote military garrison, and build a camp step by step. However, the shadow of the Anshi Rebellion was approaching. He teamed up with the female scout Su Yanhui and took advantage of the rebellion of Ashina Gudulu, the Turkic general, to organize the world under the supervision of Yang Sixu. When the war broke out in Chang'an City, Li Ke not only took charge of the military power of Longyou, but also held the key to reversing the fate of the Tang Dynasty.