Correct

建军

/ jiàn jūn / 
Strokes

Definition

build an army

Example

As a Verb

found an army

1
Zhōngguó
中国
rénmín
人民
jiěfàngjūn
解放军
jiànjūn
建军
jìniànrì
纪念日

anniversary of the founding of the Chinese People's Liberation Army

As a Verb

build up the army

2
Jiànjūn
建军
zhǔnzé
准则

principles of army building