Delegates pose for photos in a photo exhibition celebrating the 30th anniversary of the establishment of the China-United States diplomatic relations, in Macao, south China, Sept. 22, 2009. The 30-day photo exhibition was opened here on Tuesday. (Xinhua/Liu Weiguo)

Delegates cut the ribbon for a photo exhibition celebrating the 30th anniversary of the establishment of the China-United States diplomatic relations, in Macao, south China, Sept. 22, 2009. The 30-day photo exhibition was opened here on Tuesday. (Xinhua/Liu Weiguo)

Edmund Ho Hau Wah (C), chief executive of Macao Special Administrative Region, poses for photos with other delegates in a photo exhibition celebrating the 30th anniversary of the establishment of the China-United States diplomatic relations, in Macao, south China, Sept. 22, 2009. The 30-day photo exhibition was opened here on Tuesday. (Xinhua/Liu Weiguo)