The mood of relaxing and letting go of burdens. According to the query on Kugou Music Network, the song "Empty" expresses a mood of relaxing and letting go of burdens, a positive emotion, encouraging people to relax in life, let go of burdens, and find inner peace and strength. "Empty" is a song written by Fan Xiaoxuan, composed by Allen, and sung by Fan Xiaoxuan. The song is included in the album "Thank You" released in 2015.