The song comes from "Late Love" by Li Maoshan.
According to QQ Music, "The painful heart is blank" is the lyrics in Li Maoshan's "Late Love". "Late Love" was released on March 16, 2020. This song mainly expresses the protagonist's regret and helplessness about love. The lyrics describe an emotional entanglement, which includes the protagonist's desire, pursuit and loss of love. The whole song has beautiful melody and sincere emotions, which is deeply loved by the audience.
Classic song excerpt: You should understand my love. Although I have never confessed to you, I have silently cared for you deeply for many years. Why can't you understand and don't want to give up your love? It's my long-term expectation. I can't keep your love. It's a silent hurt to her. My hurt heart is blank. How to face that belated love.