We have found one software suitable in our database for this conversion.
EXB files are CAD files from a Chinese program called CAXA. It seems that the software has innate support for exporting to DWG format, so that is your best bet for achieving exb to dwg conversion. Unfortunately, there are no sources in English to verify this information.
Updated: December 5, 2022
EXB
Files with exb file extension can be also found as CAD design files made and saved using the Chinese software called Caxa.
DWG
A dwg file extension is used for common CAD file format, originally used by AutoCAD. A DWG is a proprietary format and can only be created in AutoCAD. Other CAD programs can usually import it, but not create its proprietary form. It's because of this, that DWGs are often exported to DXF interchange format, so they can be seamlessly used in other CAD programs.