天荒之后见不到地老
[tiān huāng zhī hòu jiàn bù dào dì lăo]
'Tian Huang Zhi Hou Jian Bu Dao Di Lao' is derived from a Chinese phrase 'till the sky becomes barren and the earth grows old', which indicates an eternal love or a very long time, so it conveys feelings of longing and the passing of time.