U+F904 "滑" CJK Compatibility Ideograph-# Unicode Character

U+F904 "滑" CJK Compatibility Ideograph-# is part of the Compatibility Ideographs block, a collection of characters included in Unicode to provide round-trip compatibility with earlier East Asian character encodings, such as those used in older Japanese, Chinese, or Korean text systems. This specific ideograph corresponds to the standard CJK Unified Ideograph U+6ED1 (滑), which means "slippery" or "smooth" in various East Asian languages. The U+F904 version is a duplicate or variant form that preserves a distinct coding point from legacy standards, so that documents using those older systems can be converted into Unicode without loss of information. While visually identical to its unified counterpart, it is not typically used in modern text entry or composition, serving instead as a historical compatibility artifact.

General Properties

Code Point	U+F904
Version Added	1.1
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	"滑" U+6ED1 CJK Unified Ideograph-#

Encodings

HTML Decimal Encoding	滑
HTML Hex Encoding	滑
UTF-8 Encoding	0xEF 0xA4 0x84
UTF-16 Encoding	0xF904
UTF-32 Encoding	0x0000F904
C/C++/Java Escape	\uf904

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	"滑" U+6ED1 CJK Unified Ideograph-#
NFKC Simple Casefold	"滑" U+6ED1 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+6ED1
kDefinition	slip, slide; slippery, polished
kHangul	골:0
kIRG_KSource	K0-4D68
kKorean	KOL
kRSUnicode	85.10
kTotalStrokes	12