This book tells the story of Ding Xiaoxuan， a fourth-grade boy who one day unexpectedly realizes he has become quite chubby and gets winded after just a few steps. With his fathers encouragement， he joins a basketball team despite having no clue about basketball. Through intense training and games， he evolves from a complete novice to a reliable pillar of the team. Together with kindred spirits Zhang Linlin and Long Yiren， he endures the setbacks of losing games， matures， and finally helps the “Salty Fish Team” — mocked as hopeless underdogs — clinch the elementary school championship that year， completing their dramatic turnaround.