海是没有墙的城天是没有人的坟
[hăi shì méi yŏu qiáng de chéng tiān shì méi yŏu rén de fén]
'The Ocean is a City Without Walls and Sky is a Tomb Without People' evokes a sense of vast emptiness and isolation. It contrasts bustling life (the city) and deathly silence (the tomb), emphasizing solitude amidst large expanses.