China is engaged in a campaign of increasing its military projection capabilities globally. The Arctic seems to be part of that intent, although they have had some setbacks, as we can see through open sources over the last year. Their icebreaker, for instance, didn't leave port this year. It was very likely undergoing repairs and so forth.
At this moment, we don't assess that China has the capability to project military power towards the Canadian Arctic. They can certainly send vessels and they can undertake activities that might concern us, but projecting a blue-water military capability across the Pacific towards our Arctic is not something we assess as a challenge right now. It is very likely that it will become a challenge in the future, however.