At the frosty border, the enemy troops are pressing down on the border, and military orders are like iron bars locking away the last trace of life. Li Xiao led the remaining troops to defend the isolated city for seven days. They ran out of food and arrows and no reinforcements arrived. However, the commander-in-chief ordered all the troops to die in the city to express gratitude for the country's kindness. That night, he tore up the military order, stained his armor with blood, and roared: "My soldiers, Li Xiao, do not fight to die, but only to return alive!" When the morale of the army collapsed, the broken-armed general Yu Jin stepped out of the fire with his sword and defended him with his life: "You are not tearing up the order, but the life. I will bear it with you." The whole army knelt down, tears mingled with each other, and shouted General - This battle is not for loyalty to the emperor, but for the immortal backbone of these two people.