First of all: if you have questions, go to WWII: China Battlefield child board and ask there. It's far more effective than doing it here.

You also need to download the update files if you want to play the latest & last version for 1.011.
April 05. update, have to start new game:
http://www.mbrepository.com/file.php?id=1675

From the 3rd version:

1, Large scale usage of fully automatic weapons, artilleries and mines. (spoiler doesnt work)
http://i45.tinypic.com/2r3wl7l.jpg
http://i46.tinypic.com/5o75m0.jpg
http://i46.tinypic.com/2928fib.jpg

2, New tactic and formation functions with ultra high freedom:

Combat Tactic and Squad Formation System

Design your combat tactic plans against enemies.
http://i50.tinypic.com/dyu4ae.jpg

Assign your troops according to their arms of services to your squads.
http://i47.tinypic.com/8z32hu.jpg

Array squads' formations at your pleasure.
http://i45.tinypic.com/vcqltx.jpg

Under these 3 interfaces, you can click F1 to check their help files.

3, New Animations for different kinds of guns and mortars shooting poses
http://i47.tinypic.com/vh6zpy.jpg

http://i49.tinypic.com/14t7vbs.jpg

4, New items including flamethrower, new particle effects, some small creative changes and bug fixes.
http://i46.tinypic.com/532zhs.jpg

(wearing breathmask fighting in the gas)
http://i50.tinypic.com/2n186rq.jpg

Read the mod introductions before you try these new functions, or it's may hard to understand!
Also, to avoid game keys and mod keys disturbing each other, I recommend you to set the game keys like 1 ~ 6 to numpad 1 ~ 6, F1 ~ F3 to numpad 7~ 9.

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From the 2nd version:
5 Whole new systems:

1, Public Order System
Every center(town, castle and village) has this new property: Public Order. It is the reflection of how much the government and the local situation satisfy the residents.
The higher the public order is, the more efficiency the governer's order will be executed. The lower it is, the easier the management(such as automatically recruiting and manufacturing) failed.
Many things can influence the public order, player can also build some buildings or take some measures to improve it.

2, New Building System
School -- college, camp -- barrack, stall -- stable -- manege, workshop -- armory -- arsenal -- ordnance factory, radio post... not only these new buildings, they also have their own funtions that you can't abandon. They should all work together if you want a great modern army(modern I mean middle period of 20th ).

3, New Weaponry System
Manufacture yourself the swords, guns, grenades and ammos you need(if you have at least a workshop and enough craftsmen)!

4, Arming Soldier System
For a long time we consider the old MnB soldier upgrading system too flawed: why the hell can a farmer become a knight if he simply managed to kill enough enemy? Don't he need 20000 denars to buy the horse and armor, or should I provide him?
Now the soldiers don't have this privilege any more! Maybe they will pickup some pistols in the battlefield, but if you don't give them rilfes or MGs or first aid kits, they never have any chance to be riflemen or machinegunmen or medic. You are the commander to decide who can be this or that.
Remember the the weapons you had your men made in the workshop and the horses your grooms give you, now? Equip your soldiers with them! Don't want to collect the crappy trophies before? Now you can simply throw them to the foreman of workshop or your baggage, let your soldiers pick them up when they were recruited or armed.

5, Special Soldiers Ability System
This is the easiest one to understand. Medics can heal the troops, both in the battle and in the world map; generals can improve your tactices; officers can train your soldiers, they can also do many things if you assign them to garrison in your centers; local guides can increase your marching speed; with radioman, you are able to contact with your centers which have commanding officer and radio post from any distance ... ...

These are the new systems. They have been done more than 80%, now I need you to help me finish them by playing this mod and report me all the bugs or things you don't like, even things you can't understand.
Come on guys, dowload it and enjoy the game!(hopefully with the new musics, ha)