你是太阳暖我心你是月亮知我心
[nĭ shì tài yáng nuăn wŏ xīn nĭ shì yuè liàng zhī wŏ xīn]
It expresses how the other person brings warmth and comfort like the sun but also provides a soothing understanding as the moon does. The name reflects a profound emotional reliance on this person who serves both as the comforting daylight presence and the reassuring nighttime presence.