"My Sister in Dongguan" is set in Dongguan, a city full of opportunities and challenges, and tells the story of rural girl Lin Xiufang, who went south to Dongguan to work alone in order to change her family's destiny. In the factory in Dongguan, she experienced high-intensity work, complex interpersonal relationships, and the temptations and pressures of city life. At the same time, she also has to face the expectations from her family and the growth problems of her younger brother Lin Xiaoqiang. Through Lin Xiufang's struggle, the novel shows the living conditions, emotional entanglements and ideal pursuits of the new generation of migrant workers in the city, and reflects the changes and development of Dongguan, a manufacturing city.