According to QQ Music query, the song is "Flowers in the Dust".

"Who is the red cinnabar in your heart" comes from the song "Flowers in the Dust", sung by Chen Rui. This song expresses the beauty and helplessness of love, comparing the lover to the cinnabar in the heart, and using vivid metaphors to express the cherishment and longing for love.

The lyrics of this song are full of romantic and touching emotions. Through the singer's soulful interpretation, the listener is brought into a world full of love.