1, pitch and melody: Meng Jiangnv's last stop is 5. In music, pitch and melody are important elements of songs. The melody and pitch design of Meng Jiangnv's songs finally stopped at the fifth position in the notation.

2. Emotional expression: Meng Jiangnv's songs express a kind of sad and sorrowful emotion, which is reflected in the melody and pitch design of the songs, with a final pause at the position of 5 in the notation.