The Song Dynasty also saw the development of numerous major technologies, including [[gunpowder]], [[porcelain]], and the first use of the [[compass]] - used for centuries for ''[[feng shui]]'' purposes - for maritime navigation.<ref name=worlds/> It was also during the Song Dynasty that [[footbinding]], which had originated among [[courtesans]] in the [[Tang Dynasty]], became widespread throughout Chinese society.<ref>Valerie Hansen, ''The Open Empire'', New York: W.W. Norton & Company (2000), 261.</ref> | The Song Dynasty also saw the development of numerous major technologies, including [[gunpowder]], [[porcelain]], and the first use of the [[compass]] - used for centuries for ''[[feng shui]]'' purposes - for maritime navigation.<ref name=worlds/> It was also during the Song Dynasty that [[footbinding]], which had originated among [[courtesans]] in the [[Tang Dynasty]], became widespread throughout Chinese society.<ref>Valerie Hansen, ''The Open Empire'', New York: W.W. Norton & Company (2000), 261.</ref> |