xiao3la4jiao1: Ancient Chinese shoe tip styles. From top to bottom: Han dynasty, Southern and North
xiao3la4jiao1: Ancient Chinese shoe tip styles. From top to bottom: Han dynasty, Southern and Northern dynasties, Sui dynasty, and Tang dynasty. From the book Chinese Clothing by Hua Mei; an english-translated version is available in pdf form on dxfao.bjdx.gov.cn/ (link to pdf) -- source link