U+FAA1 "瑱" CJK Compatibility Ideograph-# Unicode Character

U+FAA1 "瑱" CJK Compatibility Ideograph-# is a specialized glyph from the CJK Compatibility Ideographs block, which was primarily included in Unicode to preserve roundtrip fidelity with older character encoding standards, specifically those from East Asian computing systems. Its exact meaning is not defined by a standard dictionary reading but corresponds to a specific ideograph that exists in a legacy character set, often serving as a variant form or a duplicate of a more common CJK unified ideograph. The "#" in its name denotes a placeholder for a sequence number, indicating that this code point was assigned without a formal semantic definition in common use, making it largely obsolete in modern text processing and more relevant for historical data conversion and digital preservation.

General Properties

Code Point	U+FAA1
Version Added	4.1
Name	CJK Compatibility Ideograph-#
Block	CJK Compatibility Ideographs
General Category	Other Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Canonical
Decomposition Mapping	"瑱" U+7471 CJK Unified Ideograph-#

Encodings

HTML Decimal Encoding	瑱
HTML Hex Encoding	瑱
UTF-8 Encoding	0xEF 0xAA 0xA1
UTF-16 Encoding	0xFAA1
UTF-32 Encoding	0x0000FAA1
C/C++/Java Escape	\ufaa1

Unicode Properties

Full Composition Exclusion	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Ideographic
East Asian Width	Wide
Changes When NFKC Casefolded	Yes
NFKC Casefold	"瑱" U+7471 CJK Unified Ideograph-#
NFKC Simple Casefold	"瑱" U+7471 CJK Unified Ideograph-#
Script	Han
Script Extensions	Han
Indic Syllabic Category	Other
ID Start	Yes
XID Start	Yes
ID Continue	Yes
XID Continue	Yes
Alphabetic	Yes
Vertical Orientation	Upright
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Other
Sentence Break	OLetter
Ideographic	Yes

Unihan Properties

kCompatibilityVariant	U+7471
kIRG_KPSource	KP1-597A
kRSUnicode	96.10
kTotalStrokes	14