Map changes:

In Version 4, the terrain in China has been changed a great deal in an attempt to make it more accurate. In addition to the terrain changes, much of the rail infrastructure has been downgraded, by converting the map data from rail to road. On the map itself these downgraded railways are drawn with a distinctive (narrow) line, and called "low capacity" railways.

In version 5 of the map onwards, The Yangtse River has been made navigable up to Nanking, which is made a port.

In version 6, further changes were made to the terrain in Eastern China, using more "forest" terrain in an attempt to represent the rugged nature of the terrain in this area. A number of trails were also added in this area.

New bases have been added to China as follows:

• Urumchi: This is a Chinese base, but it is under Soviet control, and is garrisoned by Soviet ground forces. The Soviets were a major presence in the Sinkiang region of China in the early years of WW2.
• Hami: An airfield that forms part of a chain of bases used to ferry aircraft to China from the Soviet Union during the Sino-Japanese war, and presumably capable of being used for the same purpose should the Soviet Union enter the war against the Japanese.
• Kanhsien: A base near Changsha, starting under Nationalist Chinese control.
• Nanyang: A base near Honan, starting under Nationalist Chinese control.
• Pucheng. A base near Foochow and Wenchow, starting under Nationalist Chinese control.
  

Customised Scenario data changes:

Nanning and Pakhoi are changed from Japanese to Chinese control. Both of these bases were under Chinese control in December 1941.

Because Urumchi is in China, the base can be used by the Chinese. Because it also contains Soviet ground units, however, an attack by the Japanese should bring the Soviet Union into the war. This can only be done by use of a house rule

Base changes - China:

The new port and airfield size/SPS values are applied in customised scenarios.