Two men sit in the main hall inside the National Grand Theatre, which has been nicknamed "The Egg", in Beijing December 14, 2010. Tuesday marks the 3rd anniversary of the National Grand Theatre. Opened in 2007, the theatre has three main halls which include a 2,416-seat opera house, a 2,017-seat concert hall with a pipe organ and a 1,040-seat theatre for plays. [Photo/Agencies]

A woman uses her mobile phone as she walks past the main hall inside the National Grand Theatre, which has been nicknamed "The Egg", in Beijing December 14, 2010. [Photo/Agencies]