Ideas for a new national stadium in Vietnam were marked up in 1998 as the government conducted a prefeasibility study for a national sports complex. In July 2000, Vietnamese Prime Minister Phan Văn Khải approved a project of a stadium at the heart of Vietnam's National Sports Complex in preparation for hosting the 2003 Southeast Asian Games. Four firms, namely Hanoi International Group (HISG - China), Philipp Holzmann (Germany), Bouygues (France) and Lemna-Keystone (United States), participated in the bidding of the stadium's construction. The process was controversial due to violations of technical and financial requirements in HISG and Holzmann's bids, corruption allegations involving a French donation as well as the intransparency in the panel's decision making. In the end, HISG won the bid and signed a commitment contract on August 14, 2001.