Nixing Clay pottery is one of the 4 famous types of Chinese ceramics, which include Yixing Zisha, Jianshui Clay. Nixing ceramics are made in Qinzhou, Guangxi. The art is quite old, having been practiced over 1300 years. The clay is found in the surrounding area of Qinzhou, is environmentally friendly, and is used without adding any glaze, paint or other chemicals, making it a safe and healthy clay for use in teaware. Nixing clay is prized for its ability to take on a patina with use, like Yixing, and for its degree of porosity. The clay is less porous than Zisha but more than porcelain, making it a good clay for use when brewing Pu-erh and Oolong.