Mozart, Symphony No.39 in E flat major, written in 1788. This is one of the three greatest symphonies composed by Mozart in less than two months (Symphony No.39 completed on June 26th, Symphony No.40 completed on July 25th and Symphony No.4 10 completed on August). This song was once known as the "swan song" to express admiration for Mozart and this work. The greatest feature of this work is that it runs through the rhythm and melody of the dance from beginning to end, which shows the author's love and optimism about life.

The work consists of four movements and adopts the structural principle of "Sonata-Symphony Suite":

The first movement: Adagio, Allegro and Long Intro provide a wonderful, quiet, solemn and harmonious artistic conception (fragment 1). The main body of this movement is an elegant "Allegro for Singing" with a simple theme. There are wonderful and full paragraphs in this movement, as well as lively second themes and endless imaginative changes.

The second movement: Andante. This song-like movement is full of meditation, beautiful and peaceful, showing the characteristics of slow March (fragment 2).

The third movement: minuet, Allegro. Full of energy, it is one of the author's most famous minuets, which reminds people of the joy of the first movement (fragment 3).

The fourth movement: Allegro, a typical sonata style, obviously Haydn style. The lively opening theme is played gently, and then repeated loudly throughout the performance. Interesting, it is a portrayal of a lively folk happy scene (fragment 4).