The protagonist Shen Yanhun passes through the down-and-out banner of the Xuanfu avant-garde, and coincides with the attack by a small group of Walas. The checkpoint is on the verge of breaking the city. In a desperate situation, he activates the border town strong army system and uses modern military knowledge to counterattack the enemy and stabilize his position. Later, he rectified the deserters under his command, eliminated the worms in the army (small flags who deducted military rations, and soldiers who collaborated with the enemy), recaptured the military camps occupied by the powerful, and ensured the food and clothing of the soldiers. During this period, he encountered several small-scale attacks by Wala, gradually explored the use of the system (troop training, weapon making), accumulated military exploits, was promoted from the general banner to a hundred households, and met loyal subordinates (veterans and young soldiers). He discovered clues that Wang Zhen's gang members were deducting military pay and having liaisons with Wala in the border town, and planted the seeds of revenge and prevention. At the end of the volume, "Defeat the Wala vanguard team with less and more" was a great point, which won the appreciation of the Xuanfu general soldier and paved the way for his subsequent entry into Beijing/promotion to a thousand households.
