U+6731 was added to Unicode in version 1.1 (1993). It belongs to the block CJK Unified Ideographs in the Basic Multilingual Plane.

This character is a Other Letter and is mainly used in the Han script. The Unihan Database defines it as cinnabar, vermilion; surname. Its Pīnyīn pronunciation is zhū.

The glyph is not a composition. It has a Wide East Asian Width. In bidirectional context it acts as Left To Right and is not mirrored. In text U+6731 behaves as Ideographic regarding line breaks. It has type OLetter for sentence and Other for word breaks. The Grapheme Cluster Break is Any.

The Wikipedia has the following information about this codepoint:

Zhu is the pinyin romanization of four Chinese surnames: 朱, 祝, 竺, and 諸. It is spelled Chu in the Wade-Giles romanization system mainly used in Hong Kong, Macau and Taiwan.

The most common of the four, 朱, was the surname of the Ming Dynasty emperors. Today it is the 13th most common surname in the People's Republic of China, with a population of over ten million.


System Representation
UTF-8 E6 9C B1
UTF-16 67 31
UTF-32 00 00 67 31
URL-Quoted %E6%9C%B1
HTML-Escape 朱
Wrong windows-1252 Mojibake 朱
Encoding: EUC-KR (hex bytes) F1 B9
Encoding: JIS0208 (hex bytes) BC EB
Pīnyīn zhū
IRG_GSource G0-566C
IRG_HSource HB1-
IRG_JSource J0-3C6B
IRG_KPSource KP0-E9E
IRG_KSource K0-7139
IRG_TSource T1-4837
IRG_VSource V1-593
BigFive A6B6
CCCII 21436F
CNS1986 1-4837
CNS1992 1-4837
EACC 21436F
GB0 5476
GB1 5476
Jis0 2875
KSC0 8125
MainlandTelegraph 2612
TaiwanTelegraph 2612
Xerox 251:171


Complete Record

Property Value
Age (age) 1.1
Unicode Name (na) CJK UNIFIED IDEOGRAPH-6731
Unicode 1 Name (na1)
Block (blk) CJK
General Category (gc) Other Letter
Script (sc) Han
Bidirectional Category (bc) Left To Right
Combining Class (ccc) Not Reordered
Decomposition Type (dt) None
Decomposition Mapping (dm) 朱
Lowercase (Lower)
Simple Lowercase Mapping (slc) 朱
Lowercase Mapping (lc) 朱
Uppercase (Upper)
Simple Uppercase Mapping (suc) 朱
Uppercase Mapping (uc) 朱
Simple Titlecase Mapping (stc) 朱
Titlecase Mapping (tc) 朱
Case Folding (cf) 朱
ASCII Hex Digit (AHex)
Alphabetic (Alpha)
Bidi Control (Bidi_C)
Bidi Mirrored (Bidi_M)
Bidi Paired Bracket (bpb) 朱
Bidi Paired Bracket Type (bpt) None
Cased (Cased)
Composition Exclusion (CE)
Case Ignorable (CI)
Full Composition Exclusion (Comp_Ex)
Changes When Casefolded (CWCF)
Changes When Casemapped (CWCM)
Changes When NFKC Casefolded (CWKCF)
Changes When Lowercased (CWL)
Changes When Titlecased (CWT)
Changes When Uppercased (CWU)
Dash (Dash)
Deprecated (Dep)
Default Ignorable Code Point (DI)
Diacritic (Dia)
East Asian Width (ea) Wide
Extender (Ext)
FC NFKC Closure (FC_NFKC) 朱
Grapheme Cluster Break (GCB) Any
Grapheme Base (Gr_Base)
Grapheme Extend (Gr_Ext)
Hex Digit (Hex)
Hangul Syllable Type (hst) Not Applicable
Hyphen (Hyphen)
ID Continue (IDC)
Ideographic (Ideo)
ID Start (IDS)
IDS Binary Operator (IDSB)
IDS Trinary Operator and (IDST)
Indic Positional Category (InPC) NA
Indic Syllabic Category (InSC) Other
ISO 10646 Comment (isc)
Joining Group (jg) No_Joining_Group
Join Control (Join_C)
Jamo Short Name (JSN)
Joining Type (jt) Non Joining
kIICore (kIICore) AGT
kIRG_GSource (kIRG_GSource) G0-566C
kIRG_HSource (kIRG_HSource) HB1-
kIRG_JSource (kIRG_JSource) J0-3C6B
kIRG_KPSource (kIRG_KPSource) KP0-E9E
kIRG_KSource (kIRG_KSource) K0-7139
kIRG_TSource (kIRG_TSource) T1-4837
kIRG_VSource (kIRG_VSource) V1-593
kIRGDaeJaweon (kIRGDaeJaweon) 0893.040
kIRGDaiKanwaZiten (kIRGDaiKanwaZiten) 14424
kIRGHanyuDaZidian (kIRGHanyuDaZidian) 21154.030
kIRGKangXi (kIRGKangXi) 0509.130
kBigFive (kBigFive) A6B6
kCangjie (kCangjie) HJD
kCantonese (kCantonese) zyu1
kCCCII (kCCCII) 21436F
kCihaiT (kCihaiT) 668.201
kCNS1986 (kCNS1986) 1-4837
kCNS1992 (kCNS1992) 1-4837
kCowles (kCowles) 316
kDaeJaweon (kDaeJaweon) 0893.040
Unihan Definition (kDefinition) cinnabar, vermilion; surname
kEACC (kEACC) 21436F
kFenn (kFenn) 499E
kFennIndex (kFennIndex) 93.04
kFourCornerCode (kFourCornerCode) 2590.0
kFrequency (kFrequency) 4
kGB0 (kGB0) 5476
kGB1 (kGB1) 5476
kGSR (kGSR) 0128a
kHangul (kHangul)
kHanYu (kHanYu) 21154.030
kHanyuPinyin (kHanyuPinyin) 21154.030:zhū,shū
kHKGlyph (kHKGlyph) 1846
kJapaneseKun (kJapaneseKun) AKA AKE
kJapaneseOn (kJapaneseOn) SHU
kJis0 (kJis0) 2875
kKangXi (kKangXi) 0509.130
kKorean (kKorean) CWU
kKPS0 (kKPS0) E9E8
kKSC0 (kKSC0) 8125
kLau (kLau) 1565
kMainlandTelegraph (kMainlandTelegraph) 2612
kMandarin (kMandarin) zhū
kMatthews (kMatthews) 1346
kMeyerWempe (kMeyerWempe) 346
kMorohashi (kMorohashi) 14424
kNelson (kNelson) 0184
kPhonetic (kPhonetic) 260
Radical Stroke Count (Adobe Japan 1-6) (kRSAdobe_Japan1_6) C+2327+75.4.2
Radical Stroke Count (KangXi) (kRSKangXi) 75.2
Radical Stroke Count (Unicode) (kRSUnicode) 75.2
kSBGY (kSBGY) 077.17
kTaiwanTelegraph (kTaiwanTelegraph) 2612
kTang (kTang) *jio zhio
Stroke Number (kTotalStrokes) 6
kVietnamese (kVietnamese) cho
kXerox (kXerox) 251:171
kXHC1983 (kXHC1983) 1506.210:zhū
Line Break (lb) Ideographic
Logical Order Exception (LOE)
Math (Math)
Noncharacter Code Point (NChar)
NFC Quick Check (NFC_QC) Yes
NFD Quick Check (NFD_QC) Yes
NFKC Casefold (NFKC_CF) 朱
NFKC Quick Check (NFKC_QC) Yes
NFKD Quick Check (NFKD_QC) Yes
Numeric Type (nt) None
Numeric Value (nv) NaN
Other Alphabetic (OAlpha)
Other Default Ignorable Code Point (ODI)
Other Grapheme Extend (OGr_Ext)
Other ID Continue (OIDC)
Other ID Start (OIDS)
Other Lowercase (OLower)
Other Math (OMath)
Other Uppercase (OUpper)
Pattern Syntax (Pat_Syn)
Pattern White Space (Pat_WS)
Quotation Mark (QMark)
Radical (Radical)
Sentence Break (SB) OLetter
Simple Case Folding (scf) 朱
Script Extension (scx) Han
Soft Dotted (SD)
STerm (STerm)
Terminal Punctuation (Term)
Unified Ideograph (UIdeo)
Variation Selector (VS)
Word Break (WB) Other
White Space (WSpace)
XID Continue (XIDC)
XID Start (XIDS)
Expands On NFC (XO_NFC)
Expands On NFD (XO_NFD)
Expands On NFKC (XO_NFKC)
Expands On NFKD (XO_NFKD)