The Sultanate of BRUNEI is a sovereign state located on the island of Borneo in Southeast Asia. It is bordered by the South China Sea and Malaysia, and has a population of over 400, 000 people. The Sultanate of BRUNEI is ruled by the Sultan of BRUNEI, who is the head of state and government. The Sultanate of BRUNEI has been in existence since the 15th century and is one of the oldest surviving monarchies in the world. BRUNEI is known for its rich culture and traditions, as well as its oil and gas reserves.