khónn-tsìng考證

to do textual research or criticism

to do textual research or criticism; to investigate and verify; to take a qualification exam in order to get a certificate

English Wiktionary, “考證” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E8%80%83%E8%AD%89 · confidence: Medium (Wiktionary, Hokkien)