Chinese martial arts, sometimes referred to by the Mandarin Chinese term wushu (simplified Chinese: 武术; traditional Chinese: 武術; pinyin: wǔshù) and popularly as kung fu (Chinese: 功夫 pinyin: gōngfū), consist of a number of fighting styles that were developed over the centuries. Those fighting styles can be classified according to common themes that are identified as "families" (家, jiā), "sects" (派, pai) or "schools" (門, men) of martial arts.