Tā de pínglùn rú niúzhǔxī, zhào chū le zhǒngzhǒng hēimù.
His commentary acts like the Niuzhu rhino horn, exposing one hidden scandal after another.
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From the 晋书 tale of Wen Qiao 温峤 at Niuzhu cliff: he lit a rhino-horn torch to peer into the deep waters and saw strange creatures below. The phrase came to stand for any sharp insight that exposes what is dark or concealed.
