T ran Dinh Long is a self-made Vietnamese billionaire and the founder and chairman of Hoa Phat Group, Vietnam's largest steel producer. He began his career in the 1990s by founding a company that traded and distributed construction equipment. He gradually transitioned the business into steel manufacturing, a move that would be the foundation of his massive fortune. He has since built Hoa Phat into a dominant force in the Vietnamese steel industry, with a particular focus on construction steel.

Under his leadership, Hoa Phat has invested heavily in building large-scale, modern, and integrated steel complexes, which has allowed the company to become a low-cost and highly efficient producer. The company's growth has been fueled by Vietnam's booming construction and infrastructure development. In addition to his core steel business, he has diversified the group into other areas, including industrial equipment, real estate, and agriculture. He is often referred to as the "King of Steel" in Vietnam.