Regular script
Script type	Logographic
Time period	c. 2nd century – present
Related scripts
Parent systems	Oracle bone script Small seal script Clerical script Regular script
Child systems	Ming typefaces Fangsong
Unicode
Unicode range	U+4E00–U+9FFF CJK Unified Ideographs (most common) (full list)

Regular script
"Kaishu" written in traditional (left) and simplified (right) forms
Chinese name
Traditional Chinese	楷書
Simplified Chinese	楷书
Literal meaning	model script
Transcriptions Standard Mandarin Hanyu Pinyin kǎishū Wade–Giles kʻai3-shu1 Yue: Cantonese Yale Romanization kaái syū Jyutping kaai2 syu1 Canton Romanization kai2 xu1
Alternative Chinese name
Traditional Chinese	真書
Simplified Chinese	真书
Literal meaning	real script
Transcriptions Standard Mandarin Hanyu Pinyin zhēnshū Wade–Giles chên1-shu1 Yue: Cantonese Yale Romanization jān syū Jyutping zan1 syu1 Canton Romanization zen1 xu1
Second alternative Chinese name
Chinese	正楷
Literal meaning	correct model
Transcriptions Standard Mandarin Hanyu Pinyin zhèngkǎi Wade–Giles chêng4-k'ai3 Yue: Cantonese Yale Romanization jing kaái Jyutping zing3 kaai2 Canton Romanization jing3 kai2
Third alternative Chinese name
Traditional Chinese	楷體
Simplified Chinese	楷体
Literal meaning	model form
Transcriptions Standard Mandarin Hanyu Pinyin kǎitǐ Wade–Giles k'ai3-t'i3 Yue: Cantonese Yale Romanization kaái tái Jyutping kaai2 tai2 Canton Romanization kai2 tei2
Fourth alternative Chinese name
Traditional Chinese	正書
Simplified Chinese	正书
Literal meaning	correct script
Transcriptions Standard Mandarin Hanyu Pinyin zhèngshū Wade–Giles chêng4-shu1 Yue: Cantonese Yale Romanization jing syū Jyutping zing3 syu1 Canton Romanization jing3 xu1
Vietnamese name
Vietnamese alphabet	khải thư chữ khải
Hán-Nôm	楷書 𡨸楷
Japanese name
Kanji	楷書
Hiragana	かいしょ
Transcriptions Romanization Kaisho

Chinese characters
Chinese family of scripts Written Chinese Kanji Hanja Chữ Hán
Evolution of script styles Neolithic symbols in China Oracle bone Bronze Seal Large Small Bird-worm Clerical Cursive Semi-cursive Regular Flat brush Modern typefaces Fangsong Ming Hei
Properties and classification Components Strokes order Radicals Orthography jiu zixing xin zixing Digital encoding
Collation and standards Kangxi Dictionary forms (1716) Commonly Used Characters (PRC, 2013) Commonly-Used Characters (Hong Kong, 2007) Nan Min Recommended Characters (Taiwan, 2009) Standard Form of National Characters (Taiwan, 1982) Jōyō kanji (Japan, 2010)
Reforms Simplified characters second round Traditional characters debate Japanese script reform kyūjitai
Homographs and readings Literary and colloquial readings Kanbun Idu
Variants Zetian characters
Derived systems Kana man'yōgana hiragana katakana Jurchen script Khitan large small Nüshu Bopomofo Slavonic transcription
Transliteration of Chinese

The regular script^[a] is the newest of the major Chinese script styles, emerging during the Three Kingdoms period c. 230 CE, and stylistically mature by the 7th century. It is the most common style used in modern text. In its traditional form it is the third-most common in publishing after the Ming and Gothic types used exclusively in print.^[1]

The Xuanhe Calligraphy Manual (宣和書譜) credits Wang Cizhong [zh] with creating the regular script, based on the clerical script of the early Han dynasty (202 BCE – 220 CE). It became popular during the Eastern Han and Three Kingdoms periods,^[2] with Zhong Yao (c. 151 – 230 CE),^[3] a calligrapher in the state of Cao Wei (220–266), being credited as its first master, known as the father of regular script. His famous works include the Xuanshi biao (宣示表), Jianjizhi biao (薦季直表), and Liming biao (力命表). Palaeographer Qiu Xigui^[2] describes the script in Xuanshi biao as:

...clearly emerging from the womb of early period semi-cursive script. If one were to write the tidily written variety of early period semi-cursive script in a more dignified fashion and were to use consistently the pause technique [(頓; dùn)], used to reinforce the beginning or ending of a stroke when ending horizontal strokes, a practice which already appears in early period semi-cursive script, and further were to make use of right-falling strokes with thick feet, the result would be a style of calligraphy like that in the "Xuān shì biǎo".

However, very few wrote in this script at the time other than a few literati; most continued writing in the neo-clerical script, or a hybrid form of semi-cursive and neo-clerical.^[2] The regular script did not become dominant until the 5th century during the early Northern and Southern period (420–589); there was a variety of the regular script which emerged from neo-clerical as well as regular scripts^[4] known as 'Wei regular' (魏楷; Wèikǎi) or 'Wei stele' (魏碑; Wèibēi). Thus, the regular script is descended both from the early semi-cursive style as well as from the neo-clerical script.

The script is considered to have become stylistically mature during the Tang dynasty (618–907), with the most famous and oft-imitated calligraphers of that period being the early Tang's Four Great Calligraphers (初唐四大家): Ouyang Xun, Yu Shinan, Chu Suiliang, and Xue Ji, as well as the tandem of Yan Zhenqing and Liu Gongquan.

During the Northern Song (960–1127), Emperor Huizong created an iconic style known as 'slender gold' (瘦金體; shòujīntǐ).^[5] During the Yuan dynasty (1271–1368), Zhao Mengfu (1254–1322) also became known for his own calligraphic style for the regular script, called Zhaoti (趙體).

92 rules governing the fundamental structure of regular script were established during the Qing dynasty (1644–1912); the calligrapher Huang Ziyuan [zh] wrote a guidebook illustrating these rules, with four characters provided as an example for each.

The Eight Principles of Yong encapsulate varieties of most strokes that appear in the regular script.^[6] Regular script characters with dimensions larger than 5 cm (2 in) are usually classified as 'large' (大楷; dàkǎi); those smaller than 2 cm (0.8 in) are usually classified as 'small' (小楷; xiǎokǎi), and those in between are 'medium' (中楷; zhōngkǎi).^[7]

Notable works written in regular script include the Northern and Southern-era Records of Yao Boduo Sculpturing (姚伯多造像記) and Tablet of General Guangwu (廣武將軍碑), the Sui-era Tablet of Longzang Temple (龍藏寺碑), Tombstone Record of Sui Xiaoci (蘇孝慈墓誌), and Tombstone Record of Beauty Tong (董美人墓誌), and the Tang-era Sweet Spring at Jiucheng Palace (九成宮醴泉銘).

• Fangsong typefaces are based on a printed style which developed during the Song dynasty (970–1279)
• The most common printed typeface styles, Ming and sans-serif, are based on Fangsong
• Japanese textbook typefaces (教科書体; kyōkashotai) are based on regular script, but modified so that they appear to be written with a pencil or pen. They also follow the jōyō kanji character forms.
• The bopomofo semi-syllabograms are nearly always written using regular script strokes.

• 
  Xuanshi Biao by Zhong Yao, written during the early transition from clerical script to regular script
• 
  Sheng Jiao Xu by Chu Suiliang,^[b] an example of regular script