"Tears", Carol's "Secret", Bandari's "First Snow", piano music "Cotton Snow", "Castle in the Sky", Joker Xue's "Serious Snow", "The Sound of Silence" ", "The Endless Horizon", "Purple Butterfly", "Eternal Ring", "Misty Drops", "Lyric Ditty", "Metaphor".

Extended information:

Background music (BGM for short), also known as accompanying music and soundtrack, usually refers to the music used in TV series, movies, animations, electronic games, and websites. A kind of music that adjusts the atmosphere and is inserted into the dialogue to enhance the expression of emotions and achieve an immersive feeling for the audience. In addition, the music played in some public places (such as bars, cafes, shopping malls) is also called background music.

Reference: Baidu Encyclopedia-Background Music