不平胸何以平天下
[bù píng xiōng hé yĭ píng tiān xià]
This is a wordplay in Chinese which uses 'ping' - both a pun for 'chest' and for 'peace'. So the sentence could either mean 'how do you govern the country if your chest isn’t levelled (flat)' or simply means 'how could an uneven chest bring peace to the country?' This is generally used by girls to express discontent or self-deprecating jokes about their body shape.