What is precise procedure and walking pathway for transit flight below at Beijing Capital Airport?

Please outline (best on a map) the precise pathway beginning from the arrival gate at T3 to the departure gates at T2 for :
Flight from Switzerland by Air China to PEK (Terminal 3), picking up baggage (at T3-C) and transiting to Terminal 2 with flight to Pyongyang DRNK by Korya Airlines on same day. What is the exact administrative procedure and what is the precise walking path (floors, gates, information desks, baggage claim, temporary immigration papers, custom controls, immigration controls, APM train, shuttle bus transfers, baggage check-in area etc)