In the autumn of 1938, deep in the Yimeng Mountains in a small mountain village called Mama Chi, Mother Yu and her husband Li Zhonghou were preparing for the wedding of their second son Jicheng. Looking at the happy newlyweds, Mother Yu's eldest daughter-in-law "Elder Sister" couldn't help but think of how her husband Li Jichang fled on their wedding night. The village troublemaker Niao came to tell everyone that soldiers were coming. In panic, the villagers hid in the mountain gullies. After the soldiers left, they returned to the village and found that not only had it not been plundered, but the streets had been cleaned. Some families even found money left as compensation. It turned out that the Eighth Route Army had come to Yimeng Mountain to fight against the Japanese.