HSK 7-9
口气
kǒuqì名
tone of voice; the way one speaks; manner of expression; tone
他的口气一直十分平静。
Tā de kǒu qì yì zhí shí fēn píng jìng.
His tone remained calm throughout.
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Appears across levels (7-9) in the HSK 3.0 word list.