**Wai Shi** (Corner Stone): A small square piece with slightly curved corners. Generally "using stone like a pebble, shaped like a lychee pit,"[1] it is typically used to process the dead corners after filling the clay in the interior of the base and lid, making the inner walls smooth and rounded. Made from materials such as bamboo, zisha clay, or plastic, it comes in two types: lid corner stone and base corner stone. **Carving Knife**: A decorative tool for the surface of zisha clay bodies, composed of two parts: the blade and the handle. It is typically used to carve signatures, calligraphy, and paintings, enhancing the cultural attributes of zisha ware. **Ming Zhen** (Polishing Rib): Anciently called "jiao" (horn), it is a thin piece made from ox horn. Its shape is "one cun wide, five times as long, either wedge-shaped or spindle-shaped, with a thin front and sturdy back, capable of bending and extending flexibly, suitable for varying degrees of pressure."[2] It is used for fine finishing of zisha surfaces—coarse at the front, fine at the back—by scraping and pressing the surface of the formed greenware body to make the vessel surface smooth and regular. According to different uses, it is divided into body ming zhen, spout ming zhen, lid ming zhen, and others. **Pi Mao Bu** (Leather Cloth): A polishing tool for the surface of zisha ware, usually made from fine, soft, and smooth pig leather. It is mainly used to process the turning points of the clay body and places that the ming zhen cannot reach. --- [1] Zhou Rong (Ming Dynasty), *Record of Yixing Ceramic Teapots*, in Han Qilou (ed.), *Ancient Texts on Zisha with Modern Translation*, Beijing Publishing House, January 2011, p. 31. [2] Ibid.