空城装旧人空心装爱人
[kōng chéng zhuāng jiù rén kōng xīn zhuāng ài rén]
It expresses a melancholic feeling that one is like an empty city, trying to hold on to old times or memories; or even with no emotions deep down while still carrying the beloved ones inside oneself. It represents emptiness in material world or in spiritual space, implying a strong connection to certain people, especially in terms of love or past.