暗伤连城
[àn shāng lián chéng]
This username combines a feeling of deep, hidden pain (暗伤 - dark injury, implying internal and unnoticed wounds) with the word for 'city'(城), possibly signifying someone whose pain is vast like a city spreading its damage. In essence, it evokes imagery of profound, perhaps romantic sorrow that impacts the entire person, not just an isolated emotion.