It was mentioned several times in the drama about the illness of Little Fish's mother. At first, the hospitalization expenses were too high, and Xiaoyu Jiang became a soldier because of the military family subsidies and preferential treatment. Later, Uncle Tuolong sent money home to see his mother, but he never mentioned it. Mingzhu went to the sea training ground to see the little fish and told him to help take care of his mother in the future. On another occasion, after the Mars Scout Competition, Xiaoyu escorted Long Shu's ashes home and went home to see his mother. Seeing that he is in good health, he is helping people to process shell crafts to supplement their families. Therefore, the illness at the beginning of the plot should be cured, because he was a soldier, had preferential policies for local military families, and had enough money, but he was slightly ill in his later years. Actually, this is just an introduction. Feng made it up so that this smelly fish could have a reason to join the army. Well, mother fish was only two years old when she was together.