Flight Thursday Hohhot to Beijing then to London Heathrow

Oh, ur luggage won't be directly transferred to the final destination. You need to collect at PEK and recheck it in. The tranfer procedure at PEK should be as follows:
Arriving - Transfer Hall on Level 1 - Check Boarding Pass - Health & Quarantine Inspection - Exit Frontier Inspection - Security Inspection - Customs Inspection - International Departure Waiting Area - Waiting and Boarding