Which termail do my flight of CA154 arrive at and my flight of EK depart from at Beijing capial airport?

I expect to travel on 16th January from Dalian to Beijing and then Beijing to Dubai on the same date. From Dalian I will be travelling by China Air (CA 154) and from Beijing to Dubai i will take Emirates Airline (EK). Arrival time for CA at Beijing is at 1745 hrs and Departure time for EK is at 2305 hrs. I dont know after arriving in Beijing airport where should i go through so as to take my international flight to Dubai. I here that there are three terminals, which terminal will the CA 154 arrive at and from there where should I go to get my EK? at which terminal? Please provide me with full description so that I can not get lost.