过往云烟望眼欲穿
[guò wăng yún yān wàng yăn yù chuān]
'Gone like Smoke and Clouds, Yearning with Eyes' expresses the idea that things from the past seem far and distant now, just like smoke and clouds dispersing. The person who uses this nickname might be feeling nostalgia or deep longing for things from the old days while recognizing that they cannot return.