This idiom is a perfect example of Chinese parallel structure, with two balanced phrases. First Phrase: 福如东海 (fú rú dōnghǎi) - Blessings as the Eastern Sea
Second Phrase: 寿比南山 (shòu bǐ nánshān) - Longevity compared to the Southern Mountain
The two phrases combine to form a beautiful couplet: “May your blessings be as vast as the Eastern Sea, and your longevity be comparable to the Southern Mountain.”