Sanshipan, also known as Sanpan and Kuinrenpan, is a bronze vessel cast in a block model during the reign of King Li of the Western Zhou Dynasty. There are 357 characters of gold inscriptions cast in its belly. It is the earliest land contract in China. [1][2] The style is also the first to develop cursive seal script, and it occupies an important position in the stele study system. It is one of the "Four National Treasures" [Note 1] in the late Qing Dynasty. It is now collected in the National Palace Museum in Taipei.