Four Major Clays

Yíxīng Zǐshā
Qinzhou Nixing
Jianshui Zitao
Chongqing Rongchang

In 1953, The Ministry of Culture and Tourism of the Chinese government classified Four Major Clays, they are Yixing Zisha, Qinzhou Nixing Clay, Jianshui Zitao, and Chongqing Rongchang Clay.

One reason why Yíxīng Zǐshā has such popularity is because it is much more varied.