China's Five Autonomous Regions?

If they were nations they would not be called regions.

No, they are not considered individual nations, but rather regions in China that are given the privilege to take care of themselves (to a certain degree). For the same reason, I don't think Canadians consider Quebec a nation. It's still a province and as long as it still answers to the Canadian federal government (ie. get funding from the federal government), it is then not considered a separate nation, but just another region in Canada.

They are considered different ethnic groups, but not Nations.
The Chinese Nation includes Han Chinese plus all minorities Manchu, Mongolian, etc, etc, in both Mainland and Taiwan.

Of cause not in china.

but I wonder, do realy canadian think Quebec is a country? but does Quebec have their own area guard forces(I mean malitary force not police)? Can Quebec make their own diplomatic policy or carry out their diplomatic activity without canadian govnments commision? then, what is the difference between Quebec and a state of US?

No.