海是一座无墙的城鱼是一缕未亡的魂
[hăi shì yī zuò wú qiáng de chéng yú shì yī lǚ wèi wáng de hún]
This is poetic and somewhat abstract. It suggests that the sea is open and boundless like an unwalled city. A city without walls can represent freedom and endless opportunities, symbolizing a life of openness or unpredictability. The second part likens a fish in this boundless sea to a surviving spirit ('未亡的魂' can be translated as 'undying soul'), representing life persistently carried on in such a vast world.