Fen (length)

The fen in Mandarin, fan in Cantonese or hun in Taiwanese, is a traditional Chinese unit of length. One fen equals 1/10 of a cun or 1/100 of a chi. It is 3+1⁄3 mm in China mainland, 3.71475 mm in Hong Kong and 3.030 mm in Taiwan.

China mainland

Pinyin	Character	Relative value	Metric value	Imperial value	Notes
háo	毫		μm		Chinese mil
lí	釐 or 厘		mm	0.0131 in	Chinese calibre
fēn	市分		mm	0.1312 in	Chinese line
cùn	市寸		cm	1.312 in	Chinese inch
chǐ	市尺	1	cm	13.12 in	Chinese foot
zhàng	市丈	10	m	3.645 yd	Chinese yard
yǐn	引	100	m	36.45 yd	Chinese chain
lǐ	市里	1500	500 m	546.8 yd	Chinese mile, this li is not the small li above, which has a different character and tone

These correspond to the measures listed simply as "China" in The Measures, Weights, & Moneys of All Nations.

Length measure in Taiwan is largely metric but some units derived from traditional Japanese units of measurement remain in use as a legacy of Japanese rule.
Taiwanese length units and the translation of length units in metric system (SI) shares the same character. The adjective Taiwanese can be added to address the Taiwanese unis system. For example, 台尺 means Taiwanese foot and 公尺 means meter.

"" is a Chinese word which literally means fen and cun, two traditional Chinese units of length; figuratively, it refers to the sense of propriety, or the proper degree for saying or doing something. For example, ""