Beijing's National Centre

I saw this building, National Centre for the Performing Arts (NCPA) in the magazine and I am curious. I was searching through the Google search looking for information.

If I could visit Beijing someday, I would like to see inside of this NCPA. Look's gorgeous and huge. There are 3 halls: opera hall, music hall, and theater hall. Each hall have around 2.000 seats.

It took around 6 years to build NCPA, started from December 2001.