"Glass Love", this song is an unpublished posthumous work before his brother's death, Zhang Guorong himself composed the music, Lin Xi filled in the lyrics.
Lin Xi also once said that when he filled in the words, he did not know that his brother's illness was so serious, if he knew that he himself would not write such heavy words to sing to him. At the beginning, he filled in these words for his brother, and in some places his brother said that it was too "gray", so he asked him to change, some of them changed, some insisted on not changing, lin Xi regretted it very much afterwards.

Zhang Guorong once said in an interview with Mao Shunjun that he had to make up a story for this song before singing, and when he sang, he had the picture in the story in his mind, and this sense of picture would make him sing more engaged. In zhang Guorong's words, it is that each of his songs has invested a lot of emotions in it. In fact, this is the reason why "Brother" can interpret each work movingly, no matter how good the singing ability and the perfect voice line, it can not withstand such a focused voice.