钻石哪有我女神闪亮太阳哪有我男神耀眼
[zuàn shí nă yŏu wŏ nǚ shén shăn liàng tài yáng nă yŏu wŏ nán shén yào yăn]
This nickname implies that no matter how brilliant and valuable the diamond is, it cannot match my goddess in brightness. Similarly, my hero (or love interest) stands out as much as the sun shines brightly.