Guoshan Stele, Stone monument in Zhangzhu Town, Yixing, China.

The Guoshan Stele is a cylindrical stone monument 2.35 metres high at the western foot of Guoshan in Zhangzhu Town, Yixing. Its surface is carved with 43 lines of seal script, 25 characters per line, attributed to Su Jian. The text runs clockwise around the stone from the northeast to the northwest.

An earthquake in 276 triggered the discovery of a hidden stone chamber beneath the mountain. The ruler commissioned this monument through his minister to commemorate this extraordinary event.

The text is written in seal script, chosen because its authority and mystery suited a rite communicating with the gods. The calligraphy is unusually thick and soft, with characters set close together. The stele is also called "Chan Guoshan Bei" because the inscription says a chan rite was held, while the Sanguozhi records a feng and chan sacrifice.

The stele stands at the western foot of Guoshan in Zhangzhu town, Yixing, Jiangsu, under a protective pavilion within the Guoshan Stele Park. The stone is badly worn, especially in its opening section, so bring a rubbing or transcription such as Weng Fanggang's in the Lianghan Jinshi Ji to follow the text. The inscription runs clockwise from the northeast face to the northwest.

The stele is also called the Shan Guoshan Bei, a name debated because the inscription orders a shan rite while the Sanguozhi records a feng and shan sacrifice. Its calligraphy, attributed to Su Jian, is so thick and soft that it barely resembles standard seal script; Qing scholar Zhang Qian wrote a study of it, the Guoshan Bei Kao.