The content of this book is based on the Computerized Database of Oracular Inscriptions on Tortoise Shells and Bones established by the Institute of Chinese Studies of CUHK, spanning five years from 1996 to 2001. Building on the Table in Yinxu Jiagu Keci Leizuan edited by Yao Xiao Sui, the compilers re-collated and re-arranged all Jiagu characters. A number of previously unrecorded Jiagu characters were added and some mistakes were emended. The compilers strove for precision in order to provide a comprehensive resource of ancient writing and creditable data for scientific study. It is indeed indispensable tool for Jiagu scholars.