Compatibility form of 黹

It is the compatibility form of 黹, the Han character for needlework.

The older character has a long history: oracle-bone inscriptions—records carved on animal bones or turtle shells—borrowed 黹 for a state’s name, while bronze inscriptions used it for embroidered patterns. The Shuowen Jiezi, an early Chinese character dictionary, describes stitching clothing with needle and thread. Later, 黹 also named needlework generally. One historical interpretation connects those embroidered motifs with 黼 and 黻, characters associated with patterned decoration on formal garments.

Why is there a second code point?

The extra encoding keeps source text reversible between character sets.

The CJK Compatibility Ideographs Supplement was added for round-trip conversion with CNS 11643-1992, Taiwan’s Chinese Standard Interchange Code. A round trip means converting text into Unicode and back while retaining its source character identity. Unicode advises against using these supplemental forms outside that compatibility role.

Why can this glyph turn into 黹?

Normalization folds it to 黹; 黹 + U+FE00 preserves the variant.

This code point has a canonical mapping to 黹, so Unicode normalization can replace it with the unified character. The standardized sequence 黹︀ (黹 followed by Variation Selector-1, U+FE00) keeps the compatibility glyph distinction through normalization. Use the two-character sequence when that distinction matters.