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 College London held by Alice Gast, an American chemical engineer, since September 2014. In 2012, the additional post of Provost was created. James Stirling became the first Provost of Imperial College London in August 2013. He was succeeded as Provost by Ian Walmsley in September 2018. The council is the governing body of Imperial, it consists of 23 members including the Chairman, the President, the Provost, the President of the Imperial College Union, 4 members of senior staff, and between 9 and 13 lay members who are not employees of Imperial. The current Chair is Sir Philip Dilley. In 2017/18, Imperial had