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Sister, also known as My Sister, is a 2021 Chinese coming-of-age drama film directed by Yin Ruoxi and written by You Xiaoying. It stars Zhang Zifeng in the titular lead role, with Xiao Yang, Zhu Yuanyuan, Duan Bowen, and Connor Leong as the other cast members. It was released in China on 2 April 2021. The film grossed US$52.8 million in its opening weekend, replacing Godzilla vs. Kong as the top film at the weekend Chinese box office. The film has been received positively, with acclaim for Zhang Zifeng's performance, and has sparked discussion about gender roles and traditional values in modern Chinese society.