Are Air Canada and Thai Airways in the same Terminal at Beijing Capital Airport?

I have an hour and 5 minutes to do an international to international transfer and am wondering about my baggage. I am worried I won't have time to get my bags and transfer to my new flight. Do I have to retrieve my baggage and then recheck it, or does it get sent automatically to the new airline? Also what happens if I don't make my flight because there wasn't enough time to transfer and then I miss it? Do I have to buy a whole new ticket?
First time traveler, thank you for your help!