左右开弓 [ zuǒyòukāigōng ]: lit. to shoot from both sides (idiom); fig. to display ambidexterity; to slap with one hand and then the other, in quick succession; to use both feet equally (football)
The practice, now illegal, required breaking the arch of the foot, then constricting it, which resulted in a stylized, mincing qait in the name of beauty.