明月依旧在故人何处寻
[míng yuè yī jiù zài gù rén hé chŭ xún]
Means 'Though the bright moon still exists, where can I find the people of the old days'? This phrase poetically contrasts permanence and change, evoking nostalgia or melancholy about searching for old friends or memories that have faded away like vanished companions despite unchanged scenery.