旧时凉梦已成风回首已是百年空
[jiù shí liáng mèng yĭ chéng fēng huí shŏu yĭ shì băi nián kōng]
The cool dreams of old times have turned into wind, and looking back now seems like everything of the past hundred years has been in vain. It reflects on vanished beautiful memories of past days.