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Sunflower is the story of the Zhang family in Beijing father, mother and son across three decades, centering on the tensions and misunderstandings between father and son. Nine-year-old Xiangyang is having the time of his life, free of adult supervision until the day he meets the father he can hardly remember. Having spent years away, he returns with strong ideas about his son learning to draw. But Xiangyang chafes under his father's constant rules and soon stages his own revolution against the lessons enforced.