Chengni inkstone in Jiangzhou, Jiangxi Province was founded in the Tang Dynasty and perfected in the Ming Dynasty, but it was lost in the late Ming and early Qing Dynasties. Xinjiang County, located in the north of China, was called Jiangzhou in ancient times. Cheng Ni inkstone produced here is one of the four famous inkstones in the history of China. The other three of the "four famous inkstones" are inkstones, and only Jiangzhou Chengni inkstone is mud inkstone. Cheng Ni inkstone has the characteristics of fast ink, fine quality, firmness but not dryness, and embellishment. Not only practical, but also beautifully carved, it is favored by literati and famous all over the world as a tribute.