海和天是永远不能重叠的蓝
[hăi hé tiān shì yŏng yuăn bù néng zhòng dié de lán]
Translation: 'The sea and the sky are blue that never overlap.' This phrase symbolizes elements (the sea and the sky) that while appearing the same color will always be fundamentally different, suggesting contrasts between two things (or people) that have something in common on the surface but are inherently divergent.