南城以南思念归
[nán chéng yĭ nán sī niàn guī]
This online name can be interpreted as a deep yearning for something or someone in the past. The 'South City to the South' part represents a certain distance or an unobtainable area; while 'Return of Thoughts' means the feeling of nostalgia and longing to return to a time or place filled with memories.