Correct

降职

/ jiàng zhí / 
Strokes

Definition

to demote (to a lower rank)

Example

As a Verb

lower one's position; demote

1
Tā
他
yóu
由
zhōngshì
中士
jiàngzhí
降职
wéi
为
xiàshì
下士
  
。

He was demoted from sergeant to corporal.