鞠躬尽瘁，死而后已

鞠躬盡瘁，死而後已
jūgōngjìncuì,sǐérhòuyǐ
  1. to bend to a task and spare no effort unto one's dying day (idiom); striving to the utmost one's whole life
  2. with every breath in one's body, unto one's dying day

CEDICT

Entry Composition

1 鞠躬尽瘁 jūgōngjìncuì to bend to a task and spare no effort (idiom); striving to the utmost
2 死而后已 sǐérhòuyǐ
  1. until death puts an end (idiom); one's whole life
  2. unto one's dying day