The zip file in this download is named 'Ningxia_TOTKG_OP.zip' and contains a map file named 'Ningxia_TOTKG_OP.map'. After downloading the zip file, unzip the map into the folder: \SIERRA\EmperorRotMK\Cities. That will make it available for selection in Open play, or for viewing in the editor.
This is a modified version of the Ningxia map from the "Tale of the Kitchen God" custom campaign. It is 'enormous' in size, and has an arid climate. A list of the modifications that are included on it is as follows:
1. Salt deposits were added to the north edge of the map.
2. A stone quarry was added to the northwest side of the map.