Connecting flight Intl to domestic at Beijing Capital Airport

Hello, I will be arriving in PEK from CGK (Jakarta, Indonesia) at 7:00am via Air China to connect to a flight to HRB (Harbin) which departs at 08:45am via Air China and the transit time will be 105 minutes . Does this leave me enough time to get to my connecting flight ? Are there any tips on ensuring a smooth transition? Do we have to pick up our luggage or will it be transferred to our plane automatically? Any information will be very helpful! Thank you!