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In page Nüshu:

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Chinese composer Tan Dun has created a multimedia symphony entitled Nu Shu: The Secret Songs of Women for harp, orchestra, and 13 microfilms. Tan Dun spent five years conducting field research in Hunan Province, documenting on film the various songs the women use to communicate. Those songs become a third dimension to his symphony, and are projected alongside the orchestra and harp soloist.[citation needed]