Correct

当兵

/ dāngbīng / 
Strokes

Definition

to serve in the army/to be a soldier

Example

As a Verb

be a soldier; be/serve in the army; enlist

1
Tā
他
18
18
suì
岁
nānián
那年
dāng
当
le
了
bīng
兵
  
。

He joined the army when he was 18.