勤学苦练

Explanation: Conscientiously study and hard training. 　　Source: Mu "secret" of his son, hear, and then not attempt to luck onto the shortcut, after the real hard work and practice, and finally has become a calligrapher. " 　　Examples: Upon hearing of his son, and then not attempt to luck onto the shortcut, after the real ~, and finally has become a calligrapher. (Mu "secret") Thesaurus:  Will be diligent fool, diligence is the means by which one makes up for one's dullness, Through perseverance, diligent in one's studies