Alright so you're saying:
China has destroyed every satellite in space (of course, somehow leaving their satellites unscathed, and somehow not tipping off anyone else as to what they're doing, because china is obviously the ninja of countries)
China has "hacked the internet" (k...).
China has managed to land a significant portion of their military on an iceberg (not even a glacier).
No one is able to communicate (because the Chinese hacked landline phones too or something)
All of our airplanes are useless (because we use gps systems for everything, and have since the days of the Wright Brothers).
Let's say all of that happened, as utterly improbable as it seems.
How does this prevent Canada from calling the President, saying, "We have dragons on our front porch.", and sending a scout force that'll relay all of their positions back to our Air Force? Let's pretend all of our newest equipment is completely useless, because our military decided not to include any fail safes or back up systems. How does that stop us from sending several B-52's, armed with 70,000 lbs of mayhem each, and watching as everything below them is destroyed instantly? Are all of our tanks (the best in the world, I should add) useless all of a sudden? Is every helicopter in the world grounded? Hell, if we stuck a bunker buster onto a Saber, we'd still do significant damage.
In order for your scenario to be possible, every single person on the planet would need to be asleep at the same time, except for the Chinese, and wouldn't be allowed to wake up until the Chinese had already landed and managed to destroy every satellite up there. It's an implausible scenario.
And you're completely forgetting that we have alien technology.
DUN DUN DUN