Shou-wei hao-ma method
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The shou-wei hao-ma (首尾號碼) method is an IME, for computer entry of Chinese characters and related symbols.
It represents the first two and last two strokes as numbers 0-9, building a four-digit index number that enables a quick lookup. It is based completely on the structure of the character and not on any phonetic interpretation.
This method is used to generate the Chinese character codes used in Hong Kong Identity Cards. The Hong Kong Identity Card features the Commercial Code (4 digit representations of the characters that make up the person's name, since the Shou-Wei Hao-ma is so easy to use and has cross reference to the Commercial Code, aka CTC or STC, this dictionary is one of the better ways to look up Commercial Code / CTC numbers.) A character by character lookup of the CTC/STC can be done by following the link at
http://www.bioinfo.tsinghua.edu.cn/~zhengjsh/cgi-bin/getCode.cgi
The entire CTC/STC listed in table format is at
http://code.web.idv.hk/cccode/cccode.php
For a full understanding and background of the CTC/STC see
http://en.wikipedia.org/wiki/Chinese_telegraph_code
This method was popularized in Taiwan, with the publication of the Shou-Wei Hao-ma (10.5 X 15 cm) Dictionary, authored by Chen Sun-Chi and published in Taiwan in 1964. This lookup method is one of the fastest for foreigners to grasp. It provides bo po mo fo phonetic, character phonetic/homophone, CTC #, definitions, radical and strokes, synonym and antonym and character phrases.