During the Spring and Autumn Period (770--476 B.C.) Sun Wu of Ch'i went to Wu seeking to teach King Helu military science. The king assembled 180 of his palace ladies and asked Sun Wu to train them.
春秋時代，齊國的孫武帶了一部兵法到吳國求見吳王闔廬，吳王召集一百八十名宮中美女，請孫武指揮訓練。