赴汤蹈火鞠躬尽瘁
[fù tāng dăo huŏ jū gōng jĭn cuì]
'Go Through Fire and Water, Devote Self Wholeheartedly' depicts dedication and unwavering commitment. It means willing to undertake dangerous tasks and serve wholeheartedly even to exhaustion. It reflects self-sacrifice and loyalty.