Which episode of Xu Nianliang, the fierce knife in the snow in Dabin?

Excerpt from the chapter: She didn't want to cry in front of those northern men. She stared at his face and smiled and said, "It's okay, don't worry, I won't laugh at you. Everyone is afraid of death. Look, I just cried." Xu Fengnian stood up, lowered his head, carefully put the child on a long and narrow wooden knife carved one by one according to the shape of the cold knife, and hung it around his waist. He said softly, "I found you, sweet potato." The city is full of dead cobwebs. There is a cavalry with a total number of about 10 thousand outside the city. As the sun rises, the east shines like a tide, and the white water slowly advances. Xu Fengnian put a hand on the head of the little sweet potato. Du looked at the distance and said softly, "Sweet potato, dad failed to protect your mother, but he will protect you." Today, we go home together. "

Xu Nianliang is a character in the novel "Fierce Knife in the Snow" by the warlord in the bonfire drama. Xu Nianliang's father is Xu Fengnian, the king of Beiliang Xinliang, and his mother is a sweet potato, one of the two dead people left by Xu Fengnian's mother. Xu Nianliang, a small sweet potato, was born in Dunhuang City when Xu Fengnian entered Beimang alone with sweet potato.