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 Regalia Prague. It is also difficult to define for how long the Imperial and Ceremonial Swords have belonged to the regalia. Until the 15th century the Imperial Regalia had no firm depository and sometimes accompanied the ruler on his trips through the empire. Above all with conflicts around the legality of the rule it was important to own the insignia. As depositories during this time some imperial castles or seats of reliable ministerialises are known: Emperor Sigismund transferred the Imperial Regalia "to everlasting preservation" to the Free Imperial City of Nuremberg with a dated document on 29 September 1423. They arrived