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 Estate subjects is also far from complete. The "imperial quaternions" are, rather, a more or less random selection intended to represent "pars pro toto" the structure of the imperial constitution. Imperial Estate An Imperial State or Imperial Estate (; , plural: ') was a part of the Holy Roman Empire with representation and the right to vote in the Imperial Diet ('). Rulers of these Estates were able to exercise significant rights and privileges and were "immediate", meaning that the only authority above them was the Holy Roman Emperor. They were thus able to rule their territories with a considerable degree