黄钻再黄也黄不过我
[huáng zuàn zài huáng yĕ huáng bù guò wŏ]
Translates as 'Even if the yellow diamond shines brightly, mine outshines it.' Yellow diamonds can indicate rarity and value. This could imply that even though something is valuable or attractive, the user sees themselves as more so. Alternatively, this has a slang nuance about materialism and competition.