天空没了你突然暗淡
[tiān kōng méi le nĭ tū rán àn dàn]
'Sky becomes dim when you're gone', expressing a profound sadness about losing someone, something or a particular emotion in their life. It suggests that a significant presence in the sky brings brightness, and in the owner’s life, their departure would make life lose luster, just like the sky losing its radiance.