GUARD MODE ABUSE
You know the situation! You snuck your Lotus into your opponent's base and all the buildings are waiting to be captured. BUT
Migs! Now you could wait for them to shoot some of your units on the battle field, grab some lunch or commit suicide but in many times
those damn pilots are just there waiting... for YOU!
However, most China players put their migs on ground guard mode. That means they shoot anything that comes in their range (on the ground). That means you can actually make them shoot and return to their base just by giving them something to shoot at.
Build a Bunker and watch those migs return to their base. After that it's all yours.
This would also work with a Burton or a Jarmen in any other situation you are in need to get rid of those migs. If China starts to put its Migs on air guardmode, you might as well fly a mig through its base.
The guard mode abuse works with Nukes as well. Whenever you see a Nuke on guard sitting in China's base make sure it shoots something valuable in its range. That way you can, for example, make China dozer hunt itself.
Have fun with this!
-Yoshi-