In a restaurant in Qiaogang, a town in the southern province of Guangxi, a large poster of Mao Zedong-entitled "Red Sun"-hangs below one of a Vietnamese island where Wu Guangsui, the restaurant's owner, was born. He fled to China by boat with his family in 1978 when relations between the once-friendly neighbours soured-resulting, the following year, in a brief but bloody war. Mr Wu (pictured), like some 300,000 other Vietnamese who sought refuge in China at the time, feared persecution in his home country for being a member of China's ethnic majority.
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