你是我的维他命我是你的钙加锌
[nĭ shì wŏ de wéi tā mìng wŏ shì nĭ de gài jiā xīn]
Translated as 'You are my vitamin, I am your calcium and zinc'. An expression comparing essential nutrients our bodies need, symbolically meaning both persons complement each other perfectly to sustain health - implying importance, necessity or irreplaceability between romantic partners.