Why was Lv Liangwei born in Viet Nam?

Lv Liangwei's grandfather and his brother are both traveling businessmen. Before his grandfather moved to Vietnam, they had been to all parts of Guangxi to make a living. Because of his grandfather's extensive life footprint, his death for many years, and the long-term changes in place names, it is not easy for Lv Liangwei to find his roots. He and his father traveled around Dongxing, Hepu, Nanning and other places in Guangxi to find the descendants of his grandparents. It was not until 2008 that he set foot in his hometown accompanied by his grandparents and descendants. Lv Liangwei, 1955, was born in Vietnam on February 22nd, and moved to Hong Kong from Vietnam in 1960s. He is a film actor in China and Hong Kong.