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This picture taken in Hong Kong on April 29, 2020, shows Legislative Council member Fernando Cheung holding a letter written to the public by Vo Van Hung, one of the last remaining Vietnamese "boat people" in the city, who after completing a 22 year jail term for murder four years ago, has been held at an immigration centre pending deportation, a move he is fighting in the courts. - Three decades after he landed on Hong Kong shores as a child refugee, Vo Van Hung is fighting efforts to deport him to Vietnam now that he has finished a lengthy jail sentence -- for murder. (Photo by Anthony WALLACE / AFP) / TO GO WITH: Hong Kong Vietnam crime history refugee, FOCUS by Su Xinqi (Photo by ANTHONY WALLACE/AFP via Getty Images)

This picture taken in Hong Kong on April 29, 2020, shows Legislative Council member Fernando Cheung holding a letter written to the public by Vo Van Hung, one of the last remaining Vietnamese "boat people" in the city, who after completing a 22 year jail term for murder four years ago, has been held at an immigration centre pending deportation, a move he is fighting in the courts. - Three decades after he landed on Hong Kong shores as a child refugee, Vo Van Hung is fighting efforts to deport him to Vietnam now that he has finished a lengthy jail sentence -- for murder. (Photo by Anthony WALLACE / AFP) / TO GO WITH: Hong Kong Vietnam crime history refugee, FOCUS by Su Xinqi (Photo by ANTHONY WALLACE/AFP via Getty Images)