Imperial units commonly used units for length are (li), (tseung/cheung), (tsek/chek), (tsun/chun), (fen/fan) in descending scale order. These units are now rarely used in daily life, the imperial and metric systems being preferred. The imperial equivalents are written with the same basic Chinese characters as the Chinese system. In order to distinguish between the units of the two systems, the units can be prefixed with "Ying" () for the Imperial system and "Wa" () for the Chinese system. In writing, derived characters are often used, with an additional (mouth) radical to the left of the original Chinese character, for writing imperial units.
Imperial, Missouri Imperial, Missouri Imperial is a census-designated place (CDP) in Jefferson County, Missouri, United States. The population was 4,709 at the 2010 census, up from 4,373 in 2000. It was originally known as West Kimmswick, and is located south of downtown St. Louis. St. John's Church is a historic parish church located within Imperial. Imperial is located in northeastern Jefferson County at . According to the United States Census Bureau, the CDP has a total area of , of which are land and , or 13.01%, are water. Imperial is bordered to the north by Arnold, to the south by Barnhart,