It comes from the epigram about diligence in the Ming Dynasty's "Warning the World": "The edge of the sword is sharpened, and the fragrance of plum blossoms is bitter and cold."

Plum?blossom's?fragrance?comes?from?the?bitter?cold

The founding year of Ming dynasty

The source of the work is a warning.

Famous sayings and epigrams of literary genre

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The sharp edge of the sword of justice is obtained through constant sharpening, and the plum blossoms that have survived the cold winter are more fragrant. If Yu Yi wants to have precious qualities or beautiful talents, it needs constant efforts to cultivate and overcome certain difficulties.