Do I need a Visa to change terminals?

Currently I am in China studying and before I return home I want to travel to Indonesia. My plan currently is to fly from Beijing to Jakarta, then from Bali back into Beijing, to then catch my connecting flight back home to Manchester. Currently i plan to leave my suitcase at a left luggage service in Beijing airport, which I will then pick up again when I fly in from Bali.However I don't know which side of passport control this service will be on, or whether my two connecting flights (arriving from Bali, departing to Manchester) will be to/from the same terminal. What I would like to know is, will i need to obtain an entry permitto pick up my luggage from before passport control? And will I need one to change terminals? I know I don't need it currently as i have booked my connecting flight and the stay in the aiport is less than 24 hours, but will I need one simply to collect my luggage or change terminals?/