U+5F00 "开" CJK Unified Ideograph-# Unicode Character
Unicode Version 17.0
开
U+5F00 "开" CJK Unified Ideograph-# is a foundational Chinese character traditionally meaning "to open" or "to start," and it is widely used in East Asian languages including Chinese, Japanese, and Korean. Visually composed of two simple strokes that suggest a gateway or separating action, it appears in everyday vocabulary such as "开张" (to open a business), "开始" (to begin), and "开关" (a switch or valve). In historical contexts, the character also carries meanings related to unlocking, initiating, or bringing forth, reflecting its role as a basic yet essential component in written communication across the CJK script system.
General Properties
| Code Point | U+5F00 |
| 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 | 开 |
| HTML Hex Encoding | 开 |
| UTF-8 Encoding | 0xE5 0xBC 0x80 |
| UTF-16 Encoding | 0x5F00 |
| UTF-32 Encoding | 0x00005F00 |
| C/C++/Java Escape | \u5f00 |
Unicode Properties
Unihan Properties
| kCCCII | 275E53 |
| kCangjie | MT |
| kCantonese | hoi1 |
| kDefinition | open; initiate, begin, start |
| kEACC | 275E53 |
| kFenn | 34K |
| kFennIndex | 64.05 |
| kFourCornerCode | 1044 |
| kGB0 | 3110 |
| kHanYu | 10514.030 |
| kHanyuPinlu | kāi(3483) |
| kIICore | AG |
| kIRGHanyuDaZidian | 10514.030 |
| kIRGKangXi | 0353.101 |
| kIRG_GSource | G0-3F2A |
| kIRG_JSource | J3-7431 |
| kIRG_TSource | T4-214D |
| kJapanese | カイ ひらく |
| kTGH | 2013:76 |
| kJIS0213 | 1,84,17 |
| kKangXi | 0353.101 |
| kKarlgren | 379 |
| kMainlandTelegraph | 7030 |
| kMandarin | kāi |
| kMojiJoho | MJ011123 |
| kPhonetic | 103 488 617 |
| kRSAdobe_Japan1_6 | C+16854+1.1.3 C+16854+55.3.1 |
| kRSUnicode | 55.1 1.3 |
| kSemanticVariant | U+5E75<kFenn |
| kSimplifiedVariant | "开" U+5F00 CJK Unified Ideograph-# |
| kSMSZD2003Index | 3.10 205.05 |
| kTGHZ2013 | 191.080:kāi |
| kTotalStrokes | 4 |
| kTraditionalVariant | "开" U+5F00 CJK Unified Ideograph-# "開" U+958B CJK Unified Ideograph-# |
| kUnihanCore2020 | G |
| kXHC1983 | 0626.050:kāi |