U+FA57 "練" CJK Compatibility Ideograph-# Unicode Character

U+FA57 "練" CJK Compatibility Ideograph-# is a compatibility ideograph from the CJK Compatibility Ideographs block, encoded primarily for round-trip mapping to legacy character sets rather than for modern usage. It represents a variant or duplicate form of the common Chinese character "煉" or "练", which relates to smelting, refining, or practice, but its glyph may differ slightly from the standard Unified CJK Ideograph version. Originally included to preserve one-to-one mapping with older East Asian encoding standards like CNS 11643 or JIS X 0208, this character is considered a compatibility character and is generally deprecated in favor of its unified counterpart, such as U+7149 or U+7EC3, depending on context and script.

General Properties

Code Point	U+FA57
Version Added	3.2
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	"練" U+7DF4 CJK Unified Ideograph-#

Encodings

HTML Decimal Encoding	練
HTML Hex Encoding	練
UTF-8 Encoding	0xEF 0xA9 0x97
UTF-16 Encoding	0xFA57
UTF-32 Encoding	0x0000FA57
C/C++/Java Escape	\ufa57

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	"練" U+7DF4 CJK Unified Ideograph-#
NFKC Simple Casefold	"練" U+7DF4 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+7DF4
kIRG_JSource	J3-7A2E
kJinmeiyoKanji	2010:U+7DF4
kJIS0213	1,90,14
kRSAdobe_Japan1_6	C+13399+120.6.9
kRSUnicode	120.9
kTotalStrokes	15
kUnihanCore2020	J