你是天上星你是海底月
[nĭ shì tiān shàng xīng nĭ shì hăi dĭ yuè]
In Chinese culture, this sentence compares the referred person to both a star in the sky and the moon under the sea, representing that the admired one is far out of reach but still full of attraction just like a dream-like existence, showing admiration or affection for someone from afar.