云落下你笑颜如花
[yún luò xià nĭ xiào yán rú huā]
When translated directly, it means 'When clouds fall, your smile blooms like flowers'. In Chinese culture, smiles blooming are often used to depict a person's beauty or their beautiful state. So here, the nickname describes the person's charm, especially their radiant smile, which is likened to blooming flowers after cloudy moments.