How to express the melody lines of the work in piano playing is as follows:

1. The melody uses the same sound repetition method, combined with dotted rhythm, to express power and will.

2. A progressive melody is an up and down progression of second intervals between two adjacent notes in the melody based on the progression of the scale. Because the melody is natural and smooth, it is used to express soothing and calming emotions. The melody steps up and appears bright; the melody steps down and appears dim and gentle.

3. A melody that combines two adjacent notes in a synthesized manner with an interval of three degrees or more is called "jump-in". The progression of the third interval is a small jump, and the progression of the fourth and above is a large jump. Speaking of small jumps, this is a good way to activate the melody. Used together with progression or homophonic repetition, it can form a smooth progression of the melody. When it comes to big jumps, fourths, sixths, and octaves are the most common, but the progress of big jumps makes the music more open, unrestrained, and clear.

4. Musical melody can also be repeated to deepen the impression, or you can use modulation, that is, move the entire musical paragraph higher or lower by a certain pitch position to repeat it.

5. Variations. When it comes to variations, it is not about randomly adding or subtracting a few notes to the tone, but about making the melody in a "fast, simple, slow, and complex" way, that is, simplifying complex and fast musical materials. ; Enrich simple slow music materials.

6. In contrast, if you want to expand the old music melody and gain momentum, you can use new music in terms of melody, rhythm, harmony, range, mode, speed, intensity, timbre and other factors. The materials make the music diverse in unity.

Paragraph and its basic composition:

Paragraph can usually express a relatively complete musical idea. A musical section is basically composed of music collections, sections and phrases. Lehui, the smallest unit in the structure of music, is composed of several notes combined according to a certain beat.

Music Festival, more than two music venues constitute a music festival. A phrase expands a musical section. A phrase often has more than two sections, and there is a musical section of breathing or pause. When a musical phrase develops into a musical section, there will be a relatively stable ending note, often ending on the tonic or dominant note.