我的月亮他的心c她的月亮我的心c
[wŏ de yuè liàng tā de xīn c tā de yuè liàng wŏ de xīn c]
'My Moon, His Heart C; Her Moon, My Heart C'. Possibly referring to an entangled love triangle situation where the speaker sees another person's love interest as their 'moon' (something beautiful but out of reach or belonging to someone else), while expressing possession and affection using letters to signify deeper meanings.