殷墟甲骨文之前存在着一种起码由夏初延续到殷商后期的，以毛笔主要书于简牍的更古老的字体，王城岗遗址和丁公遗址陶文从属于该文字系别。
Before the appearance of inscriptions on bones or tortoise shells of Yinxu , there existed a typeface which was mainly written on bamboo slips with the use of brushes .
丁公