海是没有墙的城岛是没有潮的心
[hăi shì méi yŏu qiáng de chéng dăo shì méi yŏu cháo de xīn]
A poetic description translating as 'the sea is a city without walls; the island, a heart without tide,' suggesting openness and depth without boundaries (for the sea) and stability with inner peace or calmness (regarding the island).