我是守护你的月亮我是陪伴你的星星
[wŏ shì shŏu hù nĭ de yuè liàng wŏ shì péi bàn nĭ de xīng xīng]
I am the moon that guards you and the star that accompanies you. This shows devotion where the person promises eternal support and presence like the constellations watching over from above.