Core Viewpoint - Actor Zhou Keyu has officially renounced his American citizenship and is now a Chinese citizen, which has led to changes in how his nationality is represented in media [2][4]. Group 1 - Zhou Keyu, who starred in the drama "Sniper Butterfly," no longer has a nationality label indicating the United States in the show's credits [1]. - Zhou Keyu's studio announced that he began the process of renouncing his U.S. citizenship upon turning 18 and has officially become a Chinese citizen [2]. - The Chinese Nationality Law states that the People's Republic of China does not recognize dual nationality, confirming that Zhou Keyu only holds Chinese citizenship [2]. Group 2 - Zhou Keyu, born Daniel Zhou on May 17, 2002, in the United States, has appeared in various dramas, including "Love for Profit" and "Nian Wushuang" [6]. - As of December 4, 2023, Zhou Keyu's social media presence includes over 4 million followers on Weibo [6].