of China Architecture Design and Research Group (CADG), said after he placed the model of the "nest" proposal at the exhibition hall and saw the rival entries he thought to himself, "We will win this."[6] . The model was approved by as the top design by a professional panel; however, it was later exhibited for the public. Once again, it was selected as the top design.[6] The "nest scheme" design became official in April 2003.[6]