往北的尽头海未眠
[wăng bĕi de jĭn tóu hăi wèi mián]
Traveling north to its end where the sea remains wakeful may be a metaphor for endless yearning or unrelenting pursuit, highlighting perseverance even when the journey seems insurmountable. There might be a romantic element to it, referring to undying affection or constant thoughts about someone or something significant.