四两拨千斤

tā píng jiè zhè yàng yī fù líng yá lì chǐ zài jiā shang sì liǎng bō qiān jīn de běn shi hòu lái yě chéng le guó huì chéng yuán

她凭借这样一副伶牙俐齿，再加上四两拨千斤的本事，后来也成了国会成员。

It turns out that with that mouth on her, combined with her economic throw-weight, she too became a member of parliament.