国产菇凉从不矫情
[guó chăn gū liáng cóng bù jiăo qíng]
Translating to 'Domestic girls aren't overly sentimental', it suggests that girls, particularly Chinese girls as indicated by the use of 国产 ('domestic') implying homegrown, don’t tend towards excessive drama or unnecessary emotions and handle matters with pragmatism and simplicity.