你是我的小小小月亮你是我的大大大太阳
[nĭ shì wŏ de xiăo xiăo xiăo yuè liàng nĭ shì wŏ de dà dà dà tài yáng]
This creative and playful name translates to 'You are my little little moon, you are my big big sun', implying that the loved one brings different kinds of light into their life—calming and brightening it in unique ways.