> it has never invaded outside its traditional borders

Your notion of "traditional borders" is where this becomes nonsense. With a little bit of revisionist history you can justify all sorts of invasions, such as the 1959 invasion of Tibet, or the desire to retake Taiwan. In reality, China is an empire, with several of its regions very unhappy to part of it (Tibet, Xinjiang, and probably more if you could only ask its people).

Only empire which exists right now is the western empire lead by US, its days are numbered, then when the propaganda curtain falls, it will be a shock. I had people of Xinjiang as my class mates, they laugh at your propaganda.