China is the world's most populous country, located in East Asia. Its capital is Beijing. Traditional Chinese music is based on a pentatonic scale and uses duple meter. It is influenced by Chinese philosophy and is used practically in society to teach and govern. Chinese music originated over 4,000 years ago and uses a five-tone scale. Instruments include bamboo flutes, stone chimes, metal gongs and bells, skin drums, silk lutes and guitars, and gourd mouth organs. Vocal music includes Buddhist chanting, narrative songs, and mountain folk songs.