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唐 Tang · 诗 Poem

从军北征

Marching North on Campaign

李益

Li Yi

天山雪后海风寒，横笛偏吹行路难。
碛里征人三十万，一时回向月明看。

After snow on the Tian Mountains, the wind off the inland sea is cold,
A transverse flute insists on playing The Road Is Hard.
Three hundred thousand men on the desert sands -
All at one moment turn and look toward the bright moon.
Listen

Meaning

A northern army has crossed into the desert after snow. The wind coming off the inland sea is bitter, and somewhere a flute is playing the old tune called The Road Is Hard. At that sound three hundred thousand soldiers turn, as one body, and look up at the moon. In four lines Li Yi gives the whole emotional arithmetic of a frontier war: the physical hardship, the music that names it, and a collective gesture in which an entire army becomes a single homesick person.

天山雪后海风寒，横笛偏吹行路难。碛里征人三十万，一时回向月明看。

Appreciation

[Plain Paraphrase] Snow has fallen on the Tian Mountains and a freezing wind blows off the great northern lake; a flute keeps insistently playing the tune called The Road Is Hard; and out on the sands, three hundred thousand campaigners, all in the same instant, turn their faces to the moon. [Structure] Two couplets, the first setting conditions and the second producing a single action; the whole poem is engineered so that twenty-eight characters lead to one gesture. [Imagery] Four elements - mountain snow, sea wind, flute, moon - and each is collective rather than private: the mountains, the sea, the tune and the moon are all things that no individual owns. [Feeling] The number three hundred thousand is the crux. Frontier poems usually show one soldier; by giving an army, Li Yi converts personal longing into something statistical and therefore unbearable. The word all at once is what makes it work: simultaneous movement across a whole desert, the immense discipline of an army used here to express the one thing that discipline cannot prevent.

【白话串讲】 李益写《从军北征》：“天山雪后海风寒，横笛偏吹行路难”——“碛里征人三十万，一时回向月明看”——他写北征——碛里征人三十万。 【意象与手法】 “天山雪后海风寒，横笛偏吹行路难”写雪后风寒与横笛；“碛里征人三十万，一时回向月明看”写征人望月。苍凉悲壮。 【情感与主旨】 李益写边塞北征之作，写天山雪后、碛里征人三十万一时回向月明看的壮观与悲凉，体现李益边塞诗苍凉悲壮的风格。 【名句点睛】 常考“天山雪后海风寒，横笛偏吹行路难”写雪后风寒；“碛里征人三十万，一时回向月明看”写征人望月。

Background

Li Yi (c. 746-c. 829), courtesy name Junyu, came from Guzang in Longxi, in the far northwest, and rose to be President of the Board of Rites. He is the most considerable frontier poet of the mid-Tang, a generation after the high Tang masters of the genre, and his reputation rested on his short poems above all: his seven-character quatrains were said to be sung by entertainers and copied onto palace walls. By his time the Tang had lost much of the Western Regions to Tibetan and steppe powers, and the northern campaigns of the period were defensive wars fought along the desert edge of the Ordos and beyond the Yellow River - wars of garrison and supply rather than of conquest. That is the world this poem describes: not a glorious advance but an army standing in the cold after snow. Li Yi himself had served on the northern and northwestern frontiers in his youth, and the accuracy of his detail - the snow, the desert tracks, the flute by night - reflects experience rather than convention.

《从军北征》为唐代诗人李益所作诗。李益（约746—约829），字君虞，陇西姑臧人，中唐边塞诗人，官至礼部尚书。此诗写边塞，为从军北征之作。诗中「天山雪后海风寒，横笛偏吹行路难」写天山雪后海风寒，横笛偏吹行路难；「碛里征人三十万，一时回向月明看」写碛里征人三十万，一时回向月明看。李益此诗以边塞、一时回向月明看写其边塞之情，苍凉悲壮，是李益诗中的名篇。此篇《从军北征》在历代选本中多被收录，其艺术价值与流传之广，正可见此诗在同类题材中的重要地位。诗人以匠心独运之笔写寻常之情事，遂使此作历千载而犹有生气，为后人所称赏不绝。此篇《从军北征》在历代选本中多被收录，其艺术价值与流传之广，正可见此诗在同类题材中的重要地位。诗人以匠心独运之笔写寻常之情事，遂使此作历千载而犹有生气，为后人所称赏不绝。此篇《从军北征》在历代选本中多被收录，其艺术价值与流传之广，正可见此诗在同类题材中的重要地位。诗人以匠心独运之笔写寻常之情事，遂使此作历千载而犹有生气，为后人所称赏不绝。

Art

The poem is a machine for producing one effect, and every line contributes to it. The first line fixes the physical world with two nouns of scale, mountains and an inland sea, and one adjective, cold; there is no human being in it yet. The second line introduces the only sound, and the adverb is the whole point - the flute chooses, of all tunes, the one called The Road Is Hard, so the music itself becomes an act of comment on the campaign. The third line supplies the human mass, and the number is deliberately vast and deliberately round: three hundred thousand is not a headcount but a way of saying an entire people under arms. The closing line then does the one thing the reader does not expect - instead of showing the army fighting or marching, it shows it turning, all together, toward the moon. The gesture is silent, useless and utterly unanimous, and that is what makes it devastating: the discipline that makes an army formidable is here displayed in the service of helplessness.

此诗艺术上以「苍凉悲壮、以笛写情」见长。全诗共四句两联，由天山雪后海风寒而碛里征人三十万。起「天山雪后海风寒，横笛偏吹行路难」写天山雪后海风寒：天山雪后海风寒，横笛偏吹行路难；结「碛里征人三十万，一时回向月明看」写碛里征人三十万：碛里征人三十万，一时回向月明看。全诗以笛写情，由天山雪后海风寒而一时回向月明看，苍凉悲壮，是李益诗中的名篇。通篇以少总多之法出之，章法严谨而用意深曲，意象凝练而情韵悠长，读之愈久，愈觉其构思之精与笔力之健，堪称同类诗作中不可多得之佳篇，足见诗人炉火纯青的艺术功力。通篇以少总多之法出之，章法严谨而用意深曲，意象凝练而情韵悠长，读之愈久，愈觉其构思之精与笔力之健，堪称同类诗作中不可多得之佳篇，足见诗人炉火纯青的艺术功力。通篇以少总多之法出之，章法严谨而用意深曲，意象凝练而情韵悠长，读之愈久，愈觉其构思之精与笔力之健，堪称同类诗作中不可多得之佳篇，足见诗人炉火纯青的艺术功力。

Allusions

The central reference is the tune. The Road Is Hard is an old music bureau title going back to the Han and known through the Bao Zhao and Li Bai settings; it is the conventional song of a journey that cannot be completed, of official frustration and of the difficulty of getting anywhere in the world. For a flute to play it on a northern campaign is therefore to say everything about the war without comment - the tune carries the judgement. The Tian Mountains and the inland sea are frontier geography with a long poetic history: the name for the northern sea or great desert lake was used from the Han onward for the farthest, emptiest water, and pairing it with the snow mountains makes a landscape at the edge of the habitable world. The moon likewise is not decoration but the single object in the poem that can be seen both from the desert and from home, which is exactly why three hundred thousand men look at it together.

诗中「天山雪后海风寒横笛偏吹行路难」「碛里征人三十万一时回向月明看」等语，皆含典故故实。「天山雪后海风寒横笛偏吹行路难」用行路难之典（行路难为乐府曲，写行路艰难），写天山雪后海风寒横笛偏吹行路难；「碛里征人三十万一时回向月明看」写碛里征人三十万一时回向月明看。诗人以行路难之典入诗，不着痕迹，而把边塞之情写得真切可感，是善于熔铸典故的体现。此等用典之法，熔铸古今而不着痕迹，既不炫博以示学，亦不拘泥于旧解，正见诗人学养之深与运思之巧。读者于此等处尤当细心玩味，方能领会其言外之旨与味外之味。此等用典之法，熔铸古今而不着痕迹，既不炫博以示学，亦不拘泥于旧解，正见诗人学养之深与运思之巧。读者于此等处尤当细心玩味，方能领会其言外之旨与味外之味。此等用典之法，熔铸古今而不着痕迹，既不炫博以示学，亦不拘泥于旧解，正见诗人学养之深与运思之巧。读者于此等处尤当细心玩味，方能领会其言外之旨与味外之味。

Commentary

Li Yi's frontier quatrains were famous in his own lifetime and have stayed famous, and this is the one most often singled out. Later critics admired above all the closing gesture: Ming and Qing readers noted that the poem's power lies in showing an army doing nothing, and doing it in unison, so that the spectacle of discipline becomes the spectacle of longing. Some have compared it with the great high Tang frontier quatrains of Wang Changling and Wang Zhihuan and argued that Li Yi's version is colder, because there is no longer any confidence in what the campaign is for. The astronomical number has also provoked discussion, since it is plainly rhetorical rather than factual; the consensus is that its very exaggeration is the point, since a precise figure would shrink the poem to a report. In modern accounts of Tang frontier verse it usually appears as the classic example of the collective image - a poem in which the emotions of an army, rather than of a single soldier, are condensed into one motion.

这首《从军北征》，是李益写边塞之作，写天山雪后海风寒、碛里征人三十万、一时回向月明看之情，苍凉悲壮。起「天山雪后海风寒，横笛偏吹行路难」——天山雪后海风寒，横笛偏吹行路难。写天山雪后海风寒：天山雪后海风寒、横笛偏吹行路难——海风寒、行路难；结「碛里征人三十万，一时回向月明看」——碛里征人三十万，一时回向月明看。写碛里征人三十万：碛里征人三十万、一时回向月明看——征人三十万、月明看。这「碛里征人三十万，一时回向月明看」，是全诗之结：以一时回向月明看写其边塞。全诗苍凉悲壮，以笛写情，正是李益诗中的名篇。综观全诗，情真、景切、理深，三者浑融无迹，故能于短短数语之中寄无限深意，令人百读不厌。其含蓄蕴藉之处，正是中国古典诗歌以少总多、言有尽而意无穷的美学精神的生动体现。综观全诗，情真、景切、理深，三者浑融无迹，故能于短短数语之中寄无限深意，令人百读不厌。其含蓄蕴藉之处，正是中国古典诗歌以少总多、言有尽而意无穷的美学精神的生动体现。

Prosody

Form A seven-character quatrain (qi yan jueju) in the regulated manner.诗（七言绝句）
Rhyme Two rhyme words, on the second and fourth lines, both in the level tone and belonging to the same broad class of open, nasal-final words. The openness of the rhyme gives the poem a wide, resonant close, appropriate to a scene set on an enormous plain.此诗为七言绝句，共四句两联。押韵：「难」「看」押寒删部韵。前两句起、后两句转合，平仄相间，正与写边塞的苍凉悲壮相称，也见其以七绝写边塞的凝练。
Tone pattern Level and oblique syllables are arranged according to the standard quatrain patterns, and the couplets are properly contrasted with one another. The first couplet is heavy with deflected tones, matching the hardness of snow and wind; the second couplet moves more evenly, and its closing level-tone rhyme word, meaning to look, leaves the poem ending on an open, prolonged sound rather than on a stop.句式上，「天山雪后海风寒，横笛偏吹行路难」写天山雪后海风寒，音节苍凉；结「碛里征人三十万，一时回向月明看」写碛里征人三十万，音节悲壮。全诗音节随情起伏，由苍凉而悲壮，正合七绝「凝练」之妙，读来如边塞、一时回向月明看之音，苍凉而动人。
Reading note The prosody supports the poem's geometry. A quatrain is small, but everything in it - mountains, an inland sea, three hundred thousand men - is large, and the tight formal frame is what prevents the vastness from becoming rhetorical. The alternation of hard deflected tones in the first couplet and the open level rhyme at the close enacts the movement of the poem itself: from a landscape that hurts to a gesture that simply goes on looking.此诗为七言绝句，是李益写边塞之作，也是其诗中的名篇。全诗的艺术特色在于「苍凉悲壮、以笛写情」：「天山雪后海风寒，横笛偏吹行路难」写天山雪后海风寒、「碛里征人三十万，一时回向月明看」写碛里征人三十万。全诗苍凉悲壮，以笛写情。尤为精妙者，是「横笛偏吹行路难」用行路难之典；而「一时回向月明看」写尽月明看之情，正是李益诗「苍凉悲壮」的典范，为历代选本所常收。《从军北征》一诗之所以读来声情并茂，正在于诗人以声韵配合情思、以节奏烘托意境，音节之长短、平仄之起伏，皆与诗意相为表里，此亦可见中国古典诗歌声律之美与匠心之工。

Line by line

天山雪后海风寒，横笛偏吹行路难。

After snow on the Tian Mountains, the wind off the inland sea is cold; a transverse flute insists on playing The Road Is Hard.

天山雪后海风寒，横笛偏吹行路难。

After snow on the Tianshan, the lake wind is cold; the transverse flute must needs play The Road is Hard.

起句写天山雪后海风寒，起笔即见其寒。「天山雪后海风寒」写天山雪后海风寒，「天山雪后」写天山雪后、「海风寒」写海风寒；「横笛偏吹行路难」用行路难之典写横笛偏吹行路难，「横笛偏吹」写横笛偏吹、「行路难」写行路难。一句写天山雪后海风寒横笛偏吹行路难，以天山雪后海风寒写海风寒、以横笛偏吹行路难写行路难，写尽天山雪后海风寒、横笛偏吹行路难之情。以寒起兴，苍凉而悲壮，是「以寒起兴」的妙笔。

The opening line writes after snow on the Tianshan, the lake wind is cold, the cold at once. The words after snow on the Tianshan write the snowy peak; the lake wind is cold the chill. The transverse flute must needs play The Road is Hard uses the Road is Hard allusion. The line writes to the full the feeling of the cold wind after snow and the flute's Road is Hard. Rising through the cold, desolate and heroic, the fine brush of rising through the cold.

碛里征人三十万，

Three hundred thousand men on the desert sands -

碛里征人三十万，

Thirty thousand conscripts in the desert,

此句写碛里征人三十万，是全诗写征人之态的关键。「碛里征人」写碛里征人，「碛里」写碛里、「征人」写征人；「三十万」写三十万，「三十」写三十、「万」写万。一句写碛里征人三十万，以碛里征人写征人、以三十万写三十万，写尽碛里征人三十万之情。以征写情，苍凉而悲壮，是「以征写情」的点睛之笔。此句以寥寥数语写尽深意，情韵兼胜，正是全诗点睛之笔。其于字句之间暗藏波澜，于平易之中寄寓曲折，尤当反复涵泳，方能得其三昧。

This line writes thirty thousand conscripts in the desert, the key of the whole's writing the conscripts. The words in the desert write the Gobi; the conscripts the soldiers. Thirty thousand writes the host. The line writes to the full the feeling of the thirty thousand in the desert. Writing feeling through the conscripts, desolate and heroic, the eye-dotting brush. In a few words it writes to the full the deep meaning, feeling and rhyme both fine; hidden waves beneath the plain words, to be savored again and again.

一时回向月明看。

All at one moment turn and look toward the bright moon.

一时回向月明看。

all at once turn and gaze toward the bright moon.

结句写一时回向月明看，是全诗立意的落点。「一时回向」写一时回向，「一时」写一时、「回向」写回向；「月明看」写月明看，「月明」写月明、「看」写看。一句写一时回向月明看，以一时回向写回向、以月明看写看，写尽一时回向月明看之情。以月写情，苍凉而悲壮，是全诗最动人处，也是「以月写情」的点睛之笔。此句以寥寥数语写尽深意，情韵兼胜，正是全诗点睛之笔。其于字句之间暗藏波澜，于平易之中寄寓曲折，尤当反复涵泳，方能得其三昧。

The closing line writes all at once turn and gaze toward the bright moon, the landing of the whole's bent. The words all at once write the simultaneous; turn and gaze the motion. The bright moon the object. The line writes to the full the feeling of the turning toward the moon. Writing feeling through the moon, desolate and heroic, the most moving place of the whole and the eye-dotting brush. In a few words it writes to the full the deep meaning, feeling and rhyme both fine; hidden waves beneath the plain words, to be savored again and again.

Study

Word focus

天山 The Tian or Celestial Mountains, the great range of the far northwest. In Tang poetry they stand for the remote frontier in general, a boundary of the habitable world rather than a precise location on a campaign map. 「天山」写天山雪后海风寒，是写天山之态的关键。「天山雪后海风寒」着一「天山」，写天山——着一「天山」，写天山雪后海风寒，见其山之天。两字写尽天山之态，是「以词写山」的妙笔。「天山」一字之用而全篇生色，与诗中情韵相为表里，正见诗人炼字之精与匠心之独运。读者于此等处若细细体会，自能领会其于平淡之中见功力、于寻常处见神奇之妙。
海风 The wind off the northern inland sea or great desert lake, a name used since the Han for the farthest and emptiest water. It makes the cold impersonal: the wind is not local weather but something blowing off the edge of the known world. 「海风」写天山雪后海风寒，是写海风之态的关键。「天山雪后海风寒」着一「海风」，写海风——着一「海风」，写天山雪后海风寒，见其风之海。两字写尽海风之态，是「以词写风」的点睛之词。「海风」一字之用而全篇生色，与诗中情韵相为表里，正见诗人炼字之精与匠心之独运。读者于此等处若细细体会，自能领会其于平淡之中见功力、于寻常处见神奇之妙。
碛里 Out on the desert sands, the stony wastes crossed by the northern garrisons. The word names the ground on which three hundred thousand men are standing, and its emptiness is what makes their simultaneous movement visible. 「碛里」写碛里征人三十万，是写碛里之态的关键。「碛里征人三十万」着一「碛里」，写碛里——着一「碛里」，写碛里征人三十万，见其里之碛。两字写尽碛里之态，是「以词写碛」的点睛之词。「碛里」一字之用而全篇生色，与诗中情韵相为表里，正见诗人炼字之精与匠心之独运。读者于此等处若细细体会，自能领会其于平淡之中见功力、于寻常处见神奇之妙。
月明 The bright moon. It is the one thing in the poem visible from both the desert and home, which is precisely why the whole army turns toward it; the phrase converts a natural object into the shared address of every man's longing. 「月明」写一时回向月明看，是写月明之态的关键。「一时回向月明看」着一「月明」，写月明——着一「月明」，写一时回向月明看，见其明之月。两字写尽月明之态，是「以词写月」的点睛之词。「月明」一字之用而全篇生色，与诗中情韵相为表里，正见诗人炼字之精与匠心之独运。读者于此等处若细细体会，自能领会其于平淡之中见功力、于寻常处见神奇之妙。

Related Reading

水调歌头·明月几时有 Song of the Water Melody: When Did the Bright Moon First Appear 苏轼 · 同写明月感怀、苍凉旷达，一写但愿人长久、一写一时回向月明看，皆于明月之中见苍凉 Both use a shared moon to connect people separated by distance.

Su Shi turns the moon into a philosophical solution: if the moon shines on both, then people may live long and share it across a thousand miles. Li Yi's moon offers no such comfort - three hundred thousand men look at it and nothing is resolved, because looking is all that campaign allows. The comparison shows the same image functioning as consolation in a Song lyric and as pure exposure in a Tang frontier quatrain.

苏轼《水调歌头·明月几时有》「但愿人长久，千里共婵娟」，写明月感怀、苍凉旷达，是宋词长调的名篇；李益《从军北征》则以「一时回向月明看」「碛里征人三十万」写月明看、征人三十万。两诗同写明月感怀、苍凉旷达：一写但愿人长久、以千里共婵娟写思亲，一写一时回向月明看、以月明写边塞；一为苏轼之旷达、一为李益之苍凉，并读正可见诗写「明月感怀」的两种笔法，皆于明月之中见苍凉。

 八声甘州·对潇潇暮雨洒江天 Eight Beats of Ganzhou: Facing the Evening Rain That Sweeps the River Sky 柳永 · 同写边塞凝望、苍凉清丽，一写对潇潇暮雨洒江天、一写天山雪后海风寒横笛偏吹行路难，皆于边塞之中见凝望 Both are poems of distance in which a broad landscape and an act of gazing carry the emotion.

Liu Yong's speaker gazes alone across a rain-washed river and explains his longing at length in the manner of the long lyric. Li Yi's three hundred thousand gazers say nothing at all, and the poem stops at their movement. The difference is one of scale and of genre: the slow lyric accumulating a single consciousness, against the quatrain collapsing a whole army into one gesture.

柳永《八声甘州·对潇潇暮雨洒江天》「对潇潇暮雨洒江天，一番洗清秋」，写边塞凝望、苍凉清丽，是宋词写羁旅的名篇；李益《从军北征》则以「天山雪后海风寒，横笛偏吹行路难」「碛里征人三十万」写海风寒、征人三十万。两诗同写边塞凝望、苍凉清丽：一写对潇潇暮雨洒江天、以暮雨写清秋，一写天山雪后海风寒横笛偏吹行路难、以行路难写边塞；一为柳永之清丽、一为李益之苍凉，并读正可见诗写「边塞凝望」的两种笔法，皆于边塞之中见凝望。