Xu Song's song "Su Yan" was released in August 2010. It was a late release among Xu Song's early masterpieces, and it was also an important turning point for Xu Song to explore songs with deep connotations. The theme of this song is about the truth and beauty in love. People can't help but immerse themselves in the melody and lyrics and feel the author's sincere emotions.

From a melody perspective, the melody of "Su Yan" is simple and affectionate, full of Xu Song's unique lyrical style. The melody of this song is smooth, and it has the simplicity of popular music and the unique charm of deep and connotative songs. In the arrangement of the song, Xu Song skillfully used various instruments and sound effects, making the whole song rich in layers without losing the simplicity and lively beauty.

From the perspective of lyrics, the lyrics of "Su Yan" are direct and sincere, full of insights on love and thoughts on life. Xu Song uses "no makeup" as the theme to depict a person's sincerity and purity in love. It also reflects people's helplessness and confusion when facing life pressure and real-life challenges. This simple and easy-to-understand way of expressing lyrics allows listeners to easily understand and feel the emotions and themes conveyed by the song.

In general, Xu Song's "Su Yan" shows his unique musical talent and deep emotional heritage in both melody and lyrics. Not only was the song critically acclaimed, it also had a profound impact on the music industry.