UNESCO Courier describes Nüshu letters, songs and sanzhaoshu, books prepared for a woman around her wedding.

Hidden Letters: Hu Xin’s Nüshu handwriting.
Hidden Letters: Hu Xin’s Nüshu handwriting.Jia Li / Independent Lens / KPBSSource · kpbs.org

These documents are a way to read the relationships behind the writing: affection, advice and the pain of separation.

Hidden Letters: Hu Xin and He Yanxin reading Nüshu letters together.
Hidden Letters: Hu Xin and He Yanxin reading Nüshu letters together.Feng Tiebing / Independent Lens / KPBSSource · kpbs.org