因公殉職

因公殉职
yīngōngxùnzhí
to die in the course of performing one's duty (idiom)

CEDICT

to die in the line of duty

Wiktionary

因執行公務而意外喪生。

重編國語辭典

為了完成職務而犧牲生命

維基詞典

Entry Composition

1 因公 yīngōng
  1. in the course of doing one's work
  2. on business
2 殉職 xùnzhí to die in the line of duty