Tuan Ngoc is Lu Lien's oldest son and the second eldest in a family of 7 siblings that would all become professional singers. From the age of 4, Tuan Ngoc had started singing on a national broadcast children's music radio program with other musical child prodigies in Vietnam. Bich Chieu, the eldest member of the family of 7 children altogether, was the first to turn professional and had become one of the most popular singers at major cabarets and dance halls in Saigon.