yǎnxí / qījiān / , / línshí / zhǐ / huī / suǒ / shè / zài / jiāowài / de / kōngkuàng / dìdài / .

演习期间，临时指挥所设在郊外的空旷地带。

During the drill, the temporary command post was set up in an open area in the suburbs.