lì​zhèng

attention

立正 lì​zhèng
attention verb
a military command given to troops to assume a stiff, upright position

The squad leader shouted to the soldiers, 'Attention!'

stand straight adverb
to stand upright or maintain a formal, upright posture

The students stood at attention on the playground.

Frequency

Movie subtitles
3.79 per million appears in 1% of films
Written text
0.833 per million

Sources

Definitions
CC-CEDICT