HSK 7-9
蹊跷
qīqiao形
odd; queer; strange; fishy
账目突然变化实在有些蹊跷。
Zhàngmù tūrán biànhuà shízài yǒuxiē qīqiao.
The sudden change in the accounts is rather suspicious.
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Appears across levels (7-9) in the HSK 3.0 word list.