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 amazon the northwest side of the mountain. A small population has been reintroduced in the Morne Trois Pitons National Park. Imperial amazons are found primarily in mountain rainforest, sometimes in elfin forest. They occur mostly at elevations of 600–1300 m above sea level. However, there have been reports of them at 150 to 300 meters in elevation because of food storage or foraging preferences. The imperial amazon is an endangered species. The number of birds has increased in the past few years; however, as of 2012, there were estimated to be only 250—350 individuals. There have been many efforts to help