The shape of these heels can vary. There are types that imitate the thick, outward-curve shape of yuanbao (sycee). There is a shape that curves inwards like a 'horseshoe', and other shapes described as 'vase'-like or 'flowerpot'-like.
Historically, unlike Han Chinese women, the aristocratic Manchu women of China did not bind their feet by tradition, but wore platformed shoes. There are several theories behind wearing this footwear, from keeping their clothing clean, to protecting their feet from insect bites.
