所有的旧时光已被埋没
[suŏ yŏu de jiù shí guāng yĭ bèi mái méi]
'All past days have been buried,' symbolizes feelings about nostalgia and memories. This username might belong to someone feeling nostalgic over the good times of yesteryear that have now faded into oblivion. Life has moved forward and those beautiful moments in history can no longer be regained. There may be an implication of pain and helplessness, or perhaps also the calm acceptance of impermanence.