Hoàng Tứ Duy (also known as Duy "Dan" Hoang) is currently the spokesperson for Viet Tan, an unsanctioned political movement in Vietnam.
Hoàng Tứ Duy (also known as Duy "Dan" Hoang) is an American Vietnamese democracy activist. He is currently the spokesperson for Viet Tan, an unsanctioned political movement in Vietnam.