The fen (Chinese: 分; pinyin: fēn) in Mandarin, fan in Cantonese or hun in Taiwanese, is a traditional Chinese unit of measurement for land area.
One fen equals 1/10th of a mu in China mainland, Hong Kong and Taiwan.
[6] Taiwan used to be ruled by Holand and then by Japan.
Its measurement system was influenced by these two countries.
[6] For details, please see article Mu (land).