I often use ancient poems to talk about mathematical principles. Recently, he explained the symmetrical beauty of couplets.

93-year-old professor teaches rhyming couplets: we can't let Tang poetry and Song poetry die out in our hands.

Pan Dingkun, a professor at Xi University of Architecture and Technology, still sticks to the podium after retirement and often uses ancient poems to explain mathematical principles. Recently, he explained the symmetrical beauty of couplets carefully and accurately. . . . . .

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