HSK 4
Shìbīng men zhǔnbèi zuòzhàn.
The soldiers are preparing for combat.
HSK 5
Tāmen zhìdìng le xiángxì de zuòzhàn jìhuà.
They drew up a detailed battle plan.
HSK 7-9
Zhè zhī bùduì zài èliè tiáojiàn xià zuòzhàn.
This unit fought under harsh conditions.