Porntip Nakhirunkanok represented the country of Thailand at Miss Universe 1988 on 24th May 1988. The coronation ceremony was sponsored by Formosa Airlines at the Lin Kou Stadium in Taipei, Taiwan. Porntip was crowned as the winner at the end of the event finale who is a Thai personality and philanthropist. She has gone on to address the United Nations, as Thailand's Goodwill Ambassador, where she spoke on behalf of the Rights of the Child bill. Her philanthropic work has built schools, fed undernourished children and provided housing for the needy. In recognition of Bui's various contributions and accomplishments, she was presented with a Royal Medal of Honour from the King of Thailand. This remains her most treasured memory.