The National Centre for the Performing Arts (NCPA), also known as the "egg," is reflected in the water in central Beijing Dec 7, 2010. The theater has three main halls -- a 2,416-seat opera house, a 2,017-seat concert hall with pipe organ and a 1,040-seat theater for plays. [Photo/Agencies]

Workers clean the exterior of the National Centre for the Performing Arts (NCPA), which has been nicknamed the "egg" in Beijing Dec 7, 2010.[Photo/Agencies]