>>712601279IIRC it's because of this: In the story the GLA does a terrorist attack on a military parade in Beijing. Then in response to that the Chinese drop a nuke on some GLA base.
It's either because they find the thought of a terrorist attack in Beijing unacceptable, or because dropping a nuke violates their own "No first use"-policy (which is that China wouldn't use nukes as the first ones to do so in a conflict). They're really anal about such things.