Four Tones of Classical Chinese – Ping, Shang, Qu, Ru | Great Four 古汉语四声 · 平上去入

古汉语四声 · 平上去入
Four Tones of Classical Chinese

两套“四声”的渊源、差异与入声之谜
Ping, Shang, Qu, Ru — and What They Tell Us About Sound, Poetry, and Time

English

Many Chinese speakers grow up learning the four tones of modern Mandarin — first tone, second tone, third tone, fourth tone. When they first encounter the classical four tones — ping, shang, qu, ru — confusion often follows. Two systems, both called “four tones,” yet structured differently. This article examines the relationship between the two systems, their divergences, and what their differences reveal about language, poetry, and the historical evolution of Chinese speech.

中文

很多中国人从小只学普通话的一二三四声。第一次接触「平上去入」古四声时，往往一时难以分清——两套都叫“四声”，体系却完全不同。本文先理清二者的传承关系与核心区别，再把入声的消亡、南北语音的分化、以及读古诗时的现实差异讲清楚，重点拆解一个常被误解的观点：普通话是标准汉语，南方方言只是地方土话；但从古汉语音韵的角度看，粤语、闽南语等南方方言反而更贴近唐朝的原始发音。

Two Systems, Two Logics — First, Let’s Clarify Each One

两套“四声”体系 – 先各自说清楚

English
1. The Classical Four Tones (Ping, Shang, Qu, Ru)
The classical four-tone system emerged during the Wei and Jin periods and was codified in the Sui and Tang dynasties. It is the phonological foundation of Tang poetry, Song ci, and classical literary Chinese — the sound system that governed the literature that defined Chinese civilization for over a millennium.

The four tones were described as follows:

Ping — the level tone: long, even, sustained, without rise or fall. A sound that moves in a straight line.

Shang — the rising tone: pitch rises, the tone bends upward, with a quality of incompleteness.

Qu — the departing tone: pitch falls, heavy and crisp, finishing decisively.

Ru — the entering tone: uniquely short, ending abruptly with a stop consonant (-p, -t, or -k) that cannot be lengthened.

For the purposes of poetry, the four tones were grouped into two categories: ping (level) and ze (oblique). Ze included shang, qu, and ru — all tones that were not level, that carried a turning, stopping, or abrupt quality. This binary distinction formed the rhythmic backbone of classical Chinese poetry.

2. The Modern Mandarin Four Tones (First, Second, Third, Fourth)
The modern Mandarin tone system emerged from the northern dialects during the Yuan, Ming, and Qing dynasties. It represents a significant simplification of the classical system: the entering tone was entirely eliminated, leaving only three classical tone categories to be redistributed into four modern tones.

First tone (high, flat): derived from one branch of the classical ping tone.

Second tone (rising): derived from the other branch of classical ping.

Third tone (dipping-rising): largely inherited from classical shang, though the contour changed.

Fourth tone (falling): directly inherited from classical qu.

中文
1. 古汉语四声（平、上、去、入）
古汉语四声诞生于魏晋南北朝，定型于隋唐，是唐诗、宋词、格律文言文唯一依靠的语音体系。它属于中古汉语发音系统，唐朝全民通用这套四声。

四类的划分大致是：

平声 – 音长舒缓、平直不升降，绵长均匀。

上声 – 声调上扬，音势抬升，读来有未尽之感。

去声- 声调下坠、厚重干脆，收尾利落。

入声 – 独有的短促声调，字音极短，末尾用-p、-t、-k塞音猛地收住，不能拖长。

写诗时，平声归为一类（平），上声、去声、入声统称为“仄” – 所有不平、顿挫、短促的声调都叫仄声。平仄交替，是古诗节奏的根基。

2. 现代普通话四声（一二三四声）
普通话四声成型于元明清时期的北方官话，是北方语音大幅简化后的产物。古汉语的入声在北方话中彻底消失，只保留三类古声调再拆分重组，形成四个声调。

一声阴平 – 对应古平声的一个分支，轻长平声。

二声阳平 – 古平声的另一分支，上扬长音。

三声上声 – 继承古上声的主体，但调型变为先降后升的曲折调。

四声去声 – 完整继承古去声，降调特征保留。

The Lineage — How the Classical Became Modern

传承关系 – 古四声如何变成普通话四声

English
The relationship between the two systems is not one of separate invention, but of simplification and reorganization. The classical four tones — ping, shang, qu, ru — were the complete set. Modern Mandarin dropped ru entirely, then split ping into two (first and second tones), while shang and qu were retained with modified contours as third and fourth tones.

The lost ru characters underwent what phonologists call ru pai san sheng (入派三声) — they were redistributed across the three remaining tones according to phonological rules. The result: a single classical ru character can end up in any of the four modern tones, with no trace of its original abruptness.

A few examples:

Hei (黑) — classical ru, modern first tone.

Bai (白) — classical ru, modern second tone.

Bai (百) — classical ru, modern third tone.

Liu (六) — classical ru, modern fourth tone.

One classical tone, scattered across all four modern ones. The original short, stopped pronunciation is completely invisible in Mandarin.

中文
古四声和普通话四声之间的关系，不是两套独立的新旧体系，而是“删减重组”。

古四声一共四类：平、上、去、入。普通话直接丢掉入声，只剩平、上、去三类基础声调。古平声一分为二，拆成普通话一声、二声；古上声大体保留，调型微调，成为普通话三声；古去声完整继承，成为普通话四声。

消失的入声字发生了“入派三声” – 所有古代读短促入声的汉字，被重新分配到普通话的各个声调里。

举个例子：

古入声字：黑、白、百、六、一、石……

普通话读音：黑（一声）、白（二声）、百（三声）、六（四声）

同一个古声调的字，如今在普通话中四分五裂，完全看不出原本短促收声的特征。

传承逻辑可以这样概括：

中古古四声（平上去入）→ 北方语音简化，剔除入声 → 古平声拆分阴阳 → 重组为现代普通话四声（无入声）

Four Core Differences — Two Systems, Four Divergences

四大核心差异 – 两套体系，四个不同

English
1. Completeness. The classical four tones form a complete phonological system — level, rising, falling, and abrupt. Mandarin has lost the abrupt tone entirely and also altered the shape of the rising tone, reducing the range of available sounds.

2. Aesthetic Function. Both systems distinguish word meaning by tone. But the classical system also served as the foundation of poetic prosody — the alternation of ping and ze created rhythm. Mandarin, lacking ru, cannot fully reproduce that rhythmic structure.

3. Length. In classical Chinese, ping, shang, and qu were long tones; ru was obligatorily short. In Mandarin, all tones can be lengthened freely.

4. Final Consonants. The classical ru ended in stop consonants (-p, -t, -k) — a momentary closure of the mouth that gave the syllable its abrupt character. Mandarin has no such endings.

中文
1. 体系完整度不同。古四声是完整闭环，长短、升降、顿挫四种音色齐全；普通话缺失入声，上声也被改造，语音层次变少。

2. 审美功能不同。两套体系都能区分字义 – 同音节不同声调对应不同汉字。但古四声还承载着诗词格律的审美功能，平仄交替是古诗节奏的骨架；普通话四声丢失入声后，无法完整还原唐诗原本的音律顿挫。

3. 字音长短规则不同。古四声有严格长短区分：平、上、去都是长音，唯独入声强制短音；普通话所有声调都可以自由拉长，不存在“必须短促收尾”的字音。

4. 韵尾结构截然不同。古入声自带-p、-t、-k闭口塞音韵尾，读完立刻闭住嘴；普通话所有汉字结尾全是元音或n/ng鼻音，没有急促的闭口尾音。

The Great Divergence — North and South

关键分水岭 – 南北走向两条不同的路

English
Why did Mandarin lose the entering tone while southern dialects preserved it? The answer lies in history.

The northern plains, repeatedly invaded and settled by non-Chinese-speaking peoples from the steppe, underwent centuries of linguistic simplification. The Yuan dynasty, with its capital in the north, accelerated the shift. By the time the Ming and Qing dynasties established Beijing as the political center, the northern dialects had lost the entering tone entirely.

In the south, mountain ranges and relative geographical isolation protected the languages from the same degree of outside influence. Cantonese, Hokkien, Wu, and Hakka preserved the classical four-tone system largely intact — including the full set of -p, -t, -k final stops. When a Cantonese speaker reads a Tang poem, they are hearing something much closer to what the original poet heard than a Mandarin speaker ever can.

中文
为什么普通话丢失了入声，而南方方言却保留了下来？答案在历史里。

中原北方地区历经多次战乱、民族融合，语音持续大幅简化。唐宋以后，北方游牧民族的语言持续影响汉语；元代定都北方，官话语音加速简化；明清北京官话持续演变，最终形成今天的普通话语音系统。

南方山地阻隔、地域相对封闭，人口流动带来的语音改动极小。粤语、闽南语、吴语、客家话至今完整保留古四声的全套体系 – 平上去入四调齐全，入声三套塞音韵尾-p、-t、-k完好无损。

What This Means for Poetry

这对诗歌意味着什么

English
The ru tone — short, sharp, abruptly cut off — was a crucial resource for Tang poets. Its brevity created contrast, tension, and emphasis. A line with several ru characters read with a different texture than one without.

Consider a famous line from Li He’s poem Song of the Goose Gate Garrison:

“Hei yun ya cheng cheng yu cui”
黑云压城城欲摧

The character 黑 (black) is a classical ru character — an abrupt, emphatic syllable. In Mandarin, it is pronounced hēi, first tone, a long even sound. The sudden punch of the original is gone. In Cantonese, it retains its abrupt, stopped quality — hak, with a final -k that cuts the sound short. The poet’s intended emphasis survives.

This is not a judgment on Mandarin. It is simply a fact: Mandarin is a modern standard designed for communication. The southern dialects preserve a sound system that is closer to what the Tang poets heard and used.

中文
入声 – 短促、尖锐、戛然而止 – 是唐代诗人手中的重要工具。它的短促创造了对比、张力与强调。一首诗中，入声字多的句子，读起来的质感完全不同。

以李贺《雁门太守行》中的名句为例：

“黑云压城城欲摧”

“黑”字在古汉语中是入声，短促而有力。在普通话中读作“hēi”，一声长平，原本的顿挫感消失了。在粤语中读作“hak”，末尾的-k塞音让字音戛然而止——诗人想要的那种压迫感，依然活着。

这不是对普通话的贬低，而是对历史的诚实。普通话是现代标准，设计用于交流。南方方言保留了一套更古老的音响系统，更接近唐代诗人笔下的声音世界。

The Character of the Four Tones — A Deeper Look

四声的性格 – 再深入一层

English
The four tones of classical Chinese are described in traditional poetics with a precision that is almost musical. Ping is long, even, and sustained: a sound that moves in a straight line, associated with smoothness, openness, and the quality of things complete in themselves. Shang moves upward, questioning, incomplete. Qu falls, resolves, concludes. Ru is short, sharp, clipped — a sound of sudden arrest.

These four tonal qualities were not merely linguistic facts; they were aesthetic resources. Chinese poets worked with the contrast between ping (level) tones and the three ze (oblique) tones — shang, qu, and ru — the way Western composers work with major and minor keys. The alternation of tonal categories across a poem’s lines created a rhythmic and sonic texture that was inseparable from the poem’s meaning.

中文
古汉语的四声在传统诗学中以几乎是音乐性的精确度加以描述。平声 – 长、平稳、持续，一种沿直线运动的声音，与流畅、开放和自足之物的品质相关联。上声 – 向上运动，带疑问性，未完成。去声 – 下落、解决、结束。入声 – 短促、尖锐、截断，以塞音收尾，带有突然停止的品质。

这四种声调品质不只是语言事实，更是审美资源。中国诗人利用平声与三种仄声 – 上、去、入 – 之间的对比，如同西方作曲家利用大调与小调一样。声调类别在诗行间的交替，创造了与诗歌含义不可分割的节奏与音响质地。

For Western Readers, and for Anyone Unfamiliar with the Classical Tones

对西方读者，以及所有不熟悉古四声的人

English
For a speaker of a non-tonal language, the Chinese tonal system can be the most cognitively demanding feature of language learning — not because the tones are technically difficult to produce, but because the brain must learn to treat tonal variation, which it has always processed as emotional or expressive information, as semantic information instead. The restructuring required is fundamental. This is also why the tones of Chinese carry a beauty that is difficult to explain to someone who has not experienced it: when the tonal system becomes automatic — when you no longer have to think about tones because they have become part of how you hear — Chinese speech acquires a musical quality that is genuinely pleasing. The four tones are not an obstacle to meaning; they are an additional dimension of meaning, one that adds a layer of sonic structure to the language that non-tonal languages simply do not have.

中文
对于非声调语言的使用者来说，汉语声调系统可能是语言学习中最具认知挑战性的特征 – 不是因为声调在技术上难以产生，而是因为大脑必须学会将声调变化 – 它一直将其作为情感或表达性信息来处理 – 作为语义信息来处理。所需的重构是根本性的。这也是为什么汉语声调具有一种难以向未曾体验过的人解释的美：当声调系统变得自动化 – 当你不再需要思考声调，因为它们已经成为你听觉方式的一部分 – 汉语言语获得了一种真正令人愉悦的音乐品质。四声不是意义的障碍，而是意义的额外维度，为语言添加了一层非声调语言所不具备的声音结构。

回顾 – 我们看到了什么

English
The classical four tones — ping, shang, qu, ru — were the complete sound system of medieval Chinese, the foundation of Tang poetry and the literary tradition that followed. The modern Mandarin four tones are a simplified descendant — a system that dropped the entering tone entirely and redistributed its characters across the remaining tones.

Mandarin and southern dialects are not different versions of the same thing. They are branches that diverged. Mandarin, shaped by centuries of northern linguistic change, is the standard of modern communication. Cantonese, Hokkien, Wu, and Hakka preserve something older — a sound system that still carries the abrupt, stopped syllables that gave Tang poetry its unique texture.

This is not a value judgment. It is a historical fact. Standard does not equal ancient. Familiar does not equal original. And when we read a Tang poem in Mandarin, we are reading a translation of the sound — not always the sound itself.

中文
古汉语四声 – 平上去入 – 是中古汉语的完整语音体系，是唐诗宋词格律的根基。现代普通话四声是它删减重组后的后代 – 删掉了入声，把入声字打散分配到其他声调中。

普通话和南方方言不是同一个东西的不同版本。它们是分岔的两条路。普通话是数百年北方语音简化的产物，是当代交流的标准工具。粤语、闽南语、吴语、客家话保留了更古老的东西 – 一套依然带着短促塞音、能够还原唐诗音律的音响系统。

这不是价值判断。这是一个历史事实。标准不等于古老。熟悉不等于原汁原味。当我们用普通话读一首唐诗时，我们读到的是一种声音的转述 – 不总是声音本身。

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