你是我心里的公主你是我世界的女王
[nĭ shì wŏ xīn lĭ de gōng zhŭ nĭ shì wŏ shì jiè de nǚ wáng]
This translates roughly into 'You're my princess at heart, you're my queen in my world', symbolizing someone very important and loved in one's life, often used in a romantic context.