At 5 p.m., uniformed workers stream out of the South China head office of the Uni-President Group in Guangzhou's Huangpu District near Humen, with a Phil Chang song blaring in the background.
離虎門不遠的廣州市黃浦區，傍晚五點一到，張宇的歌聲響起，穿著制服的員工魚貫走出統一企業華南總部。