Transfering flight with two different airlines at PEK

So i have to transfer flight at PEK, my arriving flight is at T3 and my next flight is at T2 on a completely different airline....does that mean I have to pick up my luggage and check in and go through security again for my next flight? I'm assuming this is what I have to do but want to make sure. Thank you in advance for any help anyone is able to provide.