Thank you for viewing. This is "Kousumi," a traditional Chinese solid ink. Compared to Japanese sumi ink, Kousumi contains a higher amount of glue (nikawa), resulting in a soft, deep, and slightly whitish ink color. The surface of the ink in the photo is carved with a landscape painting-like design. This is a decorative feature often seen in Chinese ink. The box containing the ink is called a "bokkou" (ink box), used to store valuable ink. The history of Chinese ink is ancient, with advanced manufacturing methods established as early as the Tang Dynasty. The Ming Dynasty saw the peak of ink-making technology, with famous ink artisans such as Cheng Junfang and Fang Yulu flourishing. After the Cultural Revolution, ink grades were sometimes represented by numbers like "Oil Smoke 101." It has been stored for a long time, so please understand that there may be some minor stains or scratches on the box.