Why China always try to capture the area of other country?

Historically, it really isn't one of the worst offenders.

While certainly influenced by it, we don't live in the past, we live in the present. There was a time when one could say that the British weren't one of the worst offenders when it came to expansion. But then they were. China's expansionism might be new but that doesn't make it less of an issue.

Not gonna happen. Doesn't Denmark ultimately have e veto power (National Security at least) over major issues in Greenland?

Buying is a loaded word. How about joining USA ? Then USA can duke it with Russia in the Artic game.

Or USA can crunch some numbers...might be cheaper to invade Canada. Fifth time is the charm as they say. Joking OK...maybe ;)

If only there was another way to get countries to do what "we" want, but nicely, because it would be mutually beneficial. We could call it "soft power".