Hong Kong to London transfer pek airport

Hi

I am flying air China from hkg to London with 2hr30 transfer time
I assume both are T3 flights. So will the process be

After your arrival→ proceed with transfer procedures → pass through the Transit Inspection in special passage in the east or west → take special elevator downstairs to International Departure Level at 2F of T3-E → accept Security Inspection in the special passage → go through the customs sample check of hand baggage if necessary → Waiting & Boarding.