L陪你呆到天荒地老M陪你呆到海枯石烂
[l péi nĭ dāi dào tiān huāng dì lăo m péi nĭ dāi dào hăi kū shí làn]
Means staying by your side until the end of time or until heaven and earth perish (partially marked as 'L' and 'M'). It symbolizes unwavering companionship and undying loyalty towards the loved ones.