Why are Xuan paper and Huizhou ink sticks important in Chinese calligraphy and painting?

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Anhui Pine branch framing peaks in the Huang Mountains, Anhui province, China.

Xuan paper and Huizhou ink sticks are essential to Chinese calligraphy and painting because they are recognized as two of the traditional "four treasures of the study." These items are highly regarded for their quality and historical significance in supporting traditional artistic practices in China. Along with Duan ink slabs and Huzhou writing brushes, they form the foundational tools required for the mastery of these classical art forms.1