The Chinese Character Code for Information Interchange () or CCCII is a character set developed by the Chinese Character Analysis Group in Taiwan. It was first published in 1980, and significantly expanded in 1982 and 1987.
Design
right|thumb|Nine characters from CCCII or EACC implementations, which are encoded as variants of [[wikt:劍|劍 (double-edged sword). The ninth of these, 釖, is usually a variant of 刀.]]
Byte ranges
CCCII is designed as an 94<sup>n</sup> set, as defined by ISO/IEC 2022. and as such, does not have a standard designation escape for use with ISO 2022. MARC-8 assigns EACC the private-use -byte 0x31 () in its implementation of ANSI X3.41 (ISO 2022).
Layers and variant characters
The 94 ISO 2022 planes are grouped into 16 layers of 6 planes each (except for layer 16, which contains the four planes 91–94). Layer 15 is unused (reserved), while layer 16 is used for other characters.
, EACC is still in extensive use for specialized bibliographic purposes. It was also an important precursor to Unicode: however, since Unicode's character unification criteria (based on those used by the Japanese JIS X 0208 and on those developed by the Association for a Common Chinese Code in China) differ from those used by CCCII, not all variant characters are individually mapped.
Punctuation, symbol, kana and jamo charts
Following are charts for punctuation, symbols, kana and Hangul jamo, showing the characters and giving possible Unicode mappings. Where possible, these are referenced against published mapping data.
Unicode mappings for Hangul syllables are omitted below for brevity, but are documented by the Library of Congress. CCCII hanzi number in the tens of thousands
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<span class="anchor" id="0x272B"></span>Character set 0x272B (plane 7, row 11: reference mark)
This row contains the reference mark (kome jirushi). (prefixed with 0x6921)
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<span class="anchor" id="0x6924"></span>Character set 0x6924 (plane 73, row 4: hiragana)
This row contains hiragana. Compare row 4 of JIS X 0208.
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