ㄧㄝˋㄐㄧㄥjīngˊㄑㄧㄣˊqín

  1. 學業精進在於勤奮努力·韓愈進學解〉:業精於勤行成於思。」

mastery of study lies in diligence (idiom)​. You can only master a subject by assiduous study., Excellence in work is only possible with diligence., Practice makes perfect.