蓝海和天只不过是一线之隔
[lán hăi hé tiān zhĭ bù guò shì yī xiàn zhī gé]
Means 'There’s just a thin line between the blue sea and the sky'. This phrase poetically captures moments of vast open scenes while also possibly conveying broader messages of interconnectedness between different aspects of life, dreams versus reality, etc., suggesting deep contemplation or reflection about boundaries.