城南旧事城北新故

Loosely translated as 'Old affairs in the South part of the city, New happenings in the North part of the city'. In China, it implies the contrast between old times (in one area) and new memories (in another). This reflects on experiences in different periods of one's life or a feeling of transition and continuity. People with a sense of sentimentality about their past and excitement about changes might choose this nickname.