暮雨萧萧郎不回
[mù yŭ xiāo xiāo láng bù huí]
The phrase describes how the rain patters heavily at dusk but my love still hasn't returned, creating a poignant and sad feeling for lovers' parting or someone eagerly awaiting for loved one coming back. Rain at twilight can bring up somber and melancholy atmospheres in many works of Chinese poets and songs, adding to the sadness of unrequited love or unsuccessful pursuit of a loved one who does not seem to come home.