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In this picture taken on September 5, 2017, Joanna Bowers, Hong Kong-based writer and director of new documentary "The Helper" gestures during an interview with AFP in Hong Kong. Each Sunday, a choir of Filipina domestic workers in Hong Kong gathers to sing songs that remind them of the children they left back home. Known as the "Unsung Heroes", what began as a group of shy performers now regularly take the stage around Hong Kong and feature in a new documentary about the lives of the city's maids, known locally as "helpers". / AFP PHOTO / Anthony WALLACE (Photo credit should read ANTHONY WALLACE/AFP/Getty Images)

In this picture taken on September 5, 2017, Joanna Bowers, Hong Kong-based writer and director of new documentary "The Helper" gestures during an interview with AFP in Hong Kong.
Each Sunday, a choir of Filipina domestic workers in Hong Kong gathers to sing songs that remind them of the children they left back home. Known as the "Unsung Heroes", what began as a group of shy performers now regularly take the stage around Hong Kong and feature in a new documentary about the lives of the city's maids, known locally as "helpers". / AFP PHOTO / Anthony WALLACE        (Photo credit should read ANTHONY WALLACE/AFP/Getty Images)