南国未暖北城已凉
[nán guó wèi nuăn bĕi chéng yĭ liáng]
This phrase can be loosely translated as 'The southern regions remain chilly, while northern cities have already cooled down,' reflecting a melancholy feeling or emotional contrast between two places or situations in one's life, often conveying nostalgia or sadness about distance and time not coinciding with one's wishes.