At the top of Suiye City, seven-year-old Li Yan knelt down to watch his parents being chopped off by the Tubo saber.
The veteran Mo Dao stuffed the blood-stained scabbard into his hand: "The sword is here, and Tang Hun is here." Ten years later, when Fire Chief Li Yan attacked the enemy camp at night, a golden military formation appeared between his eyebrows - a battle formation deduction!
The reality of the enemy camp and the position of the ambush all turned into phantom battle flags surging in front of the eyes.
From the night attack on the scout camp to the interception of the Tibetan grain road, from the team leader and brigade commander to Heshuo Jiedu, this sword that tempered the blood feud and the soul of the Tang Dynasty will eventually split the chaos of Anshi and let the four words "the military system of the prosperous Tang Dynasty" be engraved in the history of Qing Dynasty
