He commanded profound knowledge of astronomy, mathematics, Confucian classics, calendar calculation, geography, local gazetteer, phonology and exegesis.
对天文、数学、经学、历算、地理、方志、音韵、训诂均有精深研究，为乾嘉时代皖派考据大师。
He commanded profound knowledge of astronomy, mathematics, Confucian classics, calendar calculation, geography, local gazetteer, phonology and exegesis.
对天文、数学、经学、历算、地理、方志、音韵、训诂均有精深研究，为乾嘉时代皖派考据大师。
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