抬头挺胸向前走低头趴下你是狗
[tái tóu tĭng xiōng xiàng qián zŏu dī tóu pā xià nĭ shì gŏu]
A colloquial expression encouraging confidence and resilience: 'Hold your head high and walk forward; if you cower, you're no better than a dog.' This emphasizes self-respect and persistence.