We are Transiting through PEK, Do we need to take our luggage & Recheck?

We are flying Air-China the very first time and transiting through Beijing (PEK) Airport. I was just wondering about standard procedure right from arrival (Landing to PEK by Air China flight from Canada) to board connecting international flight (Another Air China flight to India)..
Do we need to pass through security again? How long that takes?
Do we need to get our luggage, recheck it to next flight?
Any other procedure?
Thank you in advance for all your help..