不成 (bù chéng) means “won't do; unable to; (at the end of a rhetorical question) can that be?”. It is an HSK 6 Chinese word in the HSK 3.0 vocabulary.
这样做不成,换个方法吧。
Zhèyàng zuò bù chéng, huàn gè fāngfǎ ba.
This won't work; let's try another method.
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