Traditionally produced in Yingde, Guangdong province and in Guanxi province, these rocks are limestone with calcite deposits. Less hard than Lingbi, they are often full of furrows with twisted lines on intricately textured surfaces. Notable for their diverse shapes, they appear to embody a thousand hills and valleys, and so are well suited for representing a far distant landscape. Their typical thin, wrinkled appearance often exhibits traces of sawing and cutting with distinguishable front and reverse sides.