守空城念旧人

'Shou kong cheng nian jiu ren' translates to 'guarding an empty city, missing old companions'. The nickname conveys nostalgia - remembering friends or acquaintances from the past in a context now devoid of these connections. There is also the idea of persistence and perhaps isolation within an abandoned or desolate space or relationship or group, but keeping vigil or watch over the same place while missing people who have gone.