The zip file in this download is named 'Xingshan-OP.zip' and contains a map file named 'Xingshan-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 Xinzheng "Star Mountain" map from "The Legend of Xingshan" custom campaign. It is 'enormous' in size, and has a temperate climate.
A list of the modifications that are included on this Open Play version of the map are as follows:
1. A full compliment of 8 fishing points were added to the river.