The files with .CEBX (Chinese ebook) extension are known as Apabi eBook files which actually replaced the CEB file format. A CEBX file includes chinese formatted text and other layout information, therefore, this file format has been discontinued.
Breif history of CEBX file format
The CEBX format file was developed by Founder Electronics’s Apabi publishers. The files of this format are available from the APABI D-Lib library which includes a collection of Chinese eBooks. These binary encoded files which can be dispayed by using Apabi softwares. The Apabi Reader 4.5.2 for Multi-Language for Microsoft Windows, Apabi Reader for Android 1.8.1 and Apabi Reader for iOS 2.4.0 supports the CEBX file formats