Origin: A unique clerical tool in China, namely the Four Treasures of the Study. Anhui is the hometown of the four treasures of the study: Hui brush, Xuan brush, Hui ink, rice paper, and She inkstone, so the four treasures of the study all originate from Anhui. The names of pen, ink, paper and inkstone originated in the Northern and Southern Dynasties.
Development process: Historically, the things referred to by "pen, ink, paper, and inkstone" have changed frequently. In the Southern Tang Dynasty, "pen, ink, paper, and inkstone" specifically referred to Zhuge's pen, Li Tinggui's ink from Huizhou, Chengxintang paper, and Longwei inkstone from Wuyuan, Jiangxi. Since the Song Dynasty, "pen, ink, paper and inkstone" have specifically referred to Hubi (Huzhou, Zhejiang Province), Huimo (Huizhou, Anhui Province), Xuan paper (Xuanzhou, Anhui Province), and Duan inkstone (Zhaoqing, Guangdong Province, known as Duanzhou in ancient times).
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