"The lingering fragrance".

According to the query on QQ Music Network, the lyrics "Brush off your dust quickly and don't dirty your eyes" are from the song "Yu Xiang", which was written by Kraft. A song composed and sung by Zhang Xiaojiu, included in the album of the same name "After Fragrance", release date: 2017-06-28.

Lyrics: Dust off the dust quickly, don’t dirty your eyes, maybe, you have long been forgotten in the conversation and laughter, and I am already full of vicissitudes in my life, missing you takes time, Recuperate slowly.