On 7 March 1939, he was invested and proclaimed Crown Prince, the official heir to the throne, in a Confucian ceremony at Can-Chanh Palace in Huế.

In 1953, Crown Prince Bảo Long attended the coronation of Elizabeth II in London, as a representative of the Vietnamese Imperial Family.

[2] Crown Prince Bảo Long served in the French Foreign Legion in the Algerian War and he highly distinguished himself, earning the Croix de Guerre (Cross of Military Valor) with three stars for his courage in battle.

[7] Crown Prince Bao Long died at the Le Centre Hospitalier Gaston Ramon, Sens, Burgundy on 28 July 2007, with his brother, Bảo Thăng, succeeding him as head of the house.

From the late 1960s until the early 1970s, Bảo Long was the companion of Isabelle Hebey (died 1996), an interior designer, who worked on his Paris residence.