"Hanja-eo" refers to words that can be written with Hanja, and "hanmun" (, ) refers to Classical Chinese writing, although "Hanja" is sometimes also used loosely to encompass these concepts. Because Hanja never underwent major reform, they are almost entirely identical to traditional Chinese and "kyūjitai" characters, though the stroke orders for some characters are slightly different. For example, the characters and are written as and . Only a small number of Hanja characters are modified or unique to Korean. By contrast, many of the Chinese characters currently in use in Japan and Mainland China have been simplified, and contain fewer strokes than the corresponding Hanja characters.