Pipe organ introduction: The pipe organ in the hall is the only pipe organ in the northwest and is the "treasure of the hall" of Xi'an Concert Hall. This pipe organ comes from the German pipe organ manufacturing family - Johannes Kleiss. It is from the same family as the pipe organ of the National Center for the Performing Arts Concert Hall. It has 78 sound stops and 4201 sound pipes. It has an elegant shape, full tone and perfect performance, which is suitable for all kinds of music. The concert hall has various usage requirements. It can be used as a soloist, ensemble and concerto with the symphony orchestra, and can also be used as accompaniment for other instrumental music and vocal music.