Allegro passionately in the first movement, in 2/4 time and sonata form. This movement shows a scene of struggle, and music symbolizes the people's power as a torrent, launching a fierce impact on the dark forces. The powerful and dynamic four tones that appear at the beginning of the music, that is, Beethoven called "fate" knocking on the door, are the main theme. This theme is a musical image that impacts forward, which promotes the continuous development of music and also appears and develops in subsequent movements. This theme is passionate and powerful, with an indomitable momentum, showing thrilling scenes of struggle and expressing Beethoven's strong will to challenge feudal forces with indignation. When all kinds of musical instruments imitate each other and set off a wave of tension one after another, the French horn plays a variant of destiny motivation, which expresses a kind of confidence to win. This is a connecting sentence, which leads to the second theme full of singing from the tense and majestic music scene in front. This is a lyric melody, with a gentle, beautiful and clear tone in contrast with the previous one, which expresses people's desire and pursuit of a happy life. Here, the severe fate motive retreats to the bass voice and appears in the form of accompaniment, which makes the gentle music have an uneasy color and promotes the continued development of music. Finally, in a clear atmosphere, the music ended with a decisive and warm sound. After an expressive pause of two bars, with the emergence of the motive of fate, the music returned to an uneasy tone and the arduous and fierce struggle began again. At this time, the first theme is very active, which is endlessly repeated, the tonality is constantly changing, and the intensity is constantly strengthened, and then the second theme like a clear and powerful horn appears. These two themes change and develop alternately in various ways, such as contrasting polyphony and frequent tone sandhi, which increase the unstable factors of music and enrich it. Finally, the motive of fate broke in again and repeated with the strongest sound, forming a dramatic climax of the development department, and the music directly entered the reproduction department. In the reproduction department, the scene of struggle in the presentation department reappears. Between the first theme and the connecting part, the oboe played a slow whining tone, and the development of the first theme was suddenly interrupted. However, the excitement immediately resumed, and it was only when the second theme appeared that it calmed down a little. However, the struggle between light and darkness is not over, and it is getting more and more intense in the huge end. At this time, the momentum of music development is unstoppable, the sharp contrast of strength and the tense development of harmony form the climax of the whole movement. At the end of the movement, the strong sound of the first theme motivation further depicts the heroic character of being brave in challenges and shows the people's strong confidence in defeating the dark forces. The second movement: Andante for a little faster, 3/8 time, double theme variation. This is a beautiful lyric poem, magnificent and brilliant, which is in contrast with the first movement. It embodies people's emotional world. After the battle, meditation and longing for a better ideal are intertwined, and finally it is transformed into firm determination. At the beginning of the music, viola and cello played the first theme with the accompaniment of double bass plucked strings, which was deep, serene and beautiful, and contained profound strength and yearning for a better life. Then, clarinet and bassoon played the second theme of fighting call. The tone of this theme is very close to the first theme, and it is related to the songs of the French Revolution. This is the heroic theme of the March style. At first, it was lyrical and thoughtful. After it was turned into C major and played by the whole band, it became a magnificent triumphant March, full of fiery vigor and inspiring people to move forward forever. The development of music in the future is six different variations of these two themes. In these six variations, Beethoven used various techniques, such as different rhythm patterns, tonality conversion, musical instrument conversion, etc., to show the hero's meditation after fierce struggle, his firm belief in overcoming darkness, and his energetic passion. For example, the first variation makes the music ups and downs and agitated with the continuous sixteenth notes of the first theme. The second variation, with the continuous appearance of thirty-two notes, enhances the motivation and shows the hero's firm belief in overcoming darkness. The last variation, like a hero's triumph, is full of heroic spirit and optimism. At the end of this movement, the first theme is simply unfolded, showing strength from deep thinking and confidence in future victory. The third movement: C minor, Allegro, 3/4 time, Scherzo. This movement is written in the form of a complex trilogy, and in tonality, it returns to the turbulent mood, as if the arduous struggle is still going on, and it is the transition and transformation to the fourth movement. The main part consists of two contrasting themes. The first theme has two factors: the first factor is that the cello and double bass play a rapid upward melody, which has a power to move forward, but it seems a little hesitant. Another factor is the response sentence based on this, which is composed of a series of chords. It is calm, restrained and shows anxiety. After this theme was stated twice, the horn played a very active and horn-like new theme. The familiar rhythm enabled us to confirm that the theme of the first movement appeared here in another image, which was dignified, steady and had the characteristics of a March. Two sharp and opposite themes with different temperaments appear in turn, showing the scenes of unrest and hard struggle, and each time they appear, they are more and more sharp, complex and full of dramatic effects. In the middle part, the passionate German-Austrian folk dance music is the central theme, and it changes from C minor to clear C major. The music adopts the contrast technique of polyphonic fugue and main melody harmony, and the mood is warm and optimistic. It is played by cello and double bass first, which is in contrast with the previous music, and has an unstoppable force, resulting in a surging trend, showing the people's strength and growing belief in winning. The third part is the dynamic reproduction part. The two themes in the first part are played in a weak voice for reproduction and development. The basic motivation rhythm of timpani percussion indicates that the contradiction and conflict are continuing, which is to accumulate the strength to prepare for the final sprint. Then, the first theme appeared softly, the music freely extended upward, the band's range continued to expand, the intensity was from weak to strong, and the tonal color was from dark to bright, which gradually developed into an unstoppable force, and the loud chords were introduced into the brilliant final movement. The fourth movement: Allegro in 4/4 time, sonata form. The grand fourth movement is full of light and incomparable joy, and it is a warm scene to cheer for victory. The main theme of the presentation part of the movement consists of two parts. The first part begins with a magnificent triumphant March, with full and powerful chords and positive melody, which is played by the whole band. In the second part, the mood of music is coherent with the front, played by horn and woodwind instruments, with bright and soft timbre, and the rhythm and emotional joy of March are full of singing. The theme of the minor part is played by stringed instruments and based on G major. This is a happy dance music with a triplet rhythm, which is relaxed and ups and downs. At the end of the presentation, a new melody associated with the presentation appeared. The development department is based on the extensive and active development of the second theme, and the rising music, like endless crowds, has merged into an ocean of joy. Near the climax, the sound pattern of "fate" came in again, but it was no longer strong and resolute, but seemed like a memory of the past struggle, echoing the first movement at a distance. The reproduction part basically repeats the music of the presentation part, and the new power is slightly increased. This new theme, like a huge wave flowing from the hero's heart, is confident, heroic and brave. At the huge end, there was a brilliant triumphant March in C major, which was overwhelming and showed the incomparable joy that the people finally won through struggle. The Fifth Symphony is one of the most representative works in Beethoven's symphony creation. Engels said, "If you haven't heard this magnificent work, you can say that you haven't heard anything in your life."