人去楼空空寂寂
[rén qù lóu kōng kōng jì jì]
This username can be translated as 'empty building, people left, silence'. This idiom is used to express the desolate feeling of finding oneself in an empty place which once was bustling with activity or filled with beloved ones. This implies a profound loneliness, where not only the physical space is vacuous but also one's emotional world.