我是你的白开水你是我的泡面
[wŏ shì nĭ de bái kāi shuĭ nĭ shì wŏ de pào miàn]
'I Am Your Plain Water; You Are My Instant Noodles.' This metaphorically suggests an indispensable mutual relationship: like how water completes instant noodles, indicating a simple yet complementary bond between two entities.