U+7901 "礁" CJK Unified Ideograph-# Unicode Character

Unicode Version 17.0

礁

U+7901 "礁" CJK Unified Ideograph-# is a Chinese character that primarily means "reef" or "rock" in a maritime or geological context, often referring to a submerged or partially exposed ridge of rock, coral, or sand near the surface of water that poses a hazard to navigation. It belongs to the CJK (Chinese, Japanese, Korean) unified ideographs block and is composed of the radical "石" (stone) on the left, indicating its association with rock or mineral elements, and the phonetic component "焦" on the right, which contributes to its pronunciation (jiāo in Mandarin). This character is commonly used in coastal geography, navigation warnings, and metaphorical expressions, such as in the compound "暗礁" (dark reef or hidden reef) to describe an unseen obstacle.

General Properties

Code Point	U+7901
Version Added	1.1
Name	CJK Unified Ideograph-#
Block	CJK Unified Ideographs
General Category	Other Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right

Encodings

HTML Decimal Encoding	礁
HTML Hex Encoding	礁
UTF-8 Encoding	0xE7 0xA4 0x81
UTF-16 Encoding	0x7901
UTF-32 Encoding	0x00007901
C/C++/Java Escape	\u7901

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
NFKC Quick Check	Yes
NFKD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Ideographic
East Asian Width	Wide
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
Unified Ideograph	Yes

Unihan Properties

kBigFive	C147
kCCCII	214E57
kCNS1986	1-7451
kCNS1992	1-7451
kCangjie	MROGF
kCantonese	ziu1
kCihaiT	974.502
kCowles	4576
kDaeJaweon	1254.150
kDefinition	reef; jetty; submerged rocks
kEACC	214E57
kFenn	56H
kFennIndex	49.02
kFourCornerCode	1063.1
kGB0	2924
kGB1	2924
kHangul	초:0N
kHanYu	42456.150
kHanyuPinyin	42456.150:jiāo
kHKGlyph	2849
kIICore	AGTJHKMP
kIRGDaeJaweon	1254.150
kIRGHanyuDaZidian	42456.150
kIRGKangXi	0837.091
kIRG_GSource	G0-3D38
kIRG_HSource	HB1-C147
kIRG_JSource	J0-3E4C
kIRG_KPSource	KP0-EDED
kIRG_KSource	K0-7527
kIRG_TSource	T1-7451
kJapanese	ショウかくれいわ
kJoyoKanji	2010
kKoreanName	2015
kTGH	2013:3397
kJapaneseKun	KAKUREIWA
kJapaneseOn	SHOU
kJis0	3044
kKangXi	0837.091
kKorean	CHO
kLau	1519
kMainlandTelegraph	4339
kMandarin	jiāo
kMatthews	725
kMeyerWempe	3392
kMojiJoho	MJ018683
kMorohashi	24502
kNelson	3220
kPhonetic	216
kRSAdobe_Japan1_6	C+2484+112.5.12
kRSUnicode	112.12
kSMSZD2003Index	476.18
kSMSZD2003Readings	jiāo粵ziu1
kTaiwanTelegraph	4339
kTGHZ2013	169.080:jiāo
kTotalStrokes	17
kUnihanCore2020	GHJKMPT
kXerox	260:350
kXHC1983	0567.020:jiāo