Terminal and transfer time

Hello, I have a fly from Copehange to Beijing and from Beijig to Tokyo. What Terminal I will arrive? And in which terminal am I going to depart for Tokyo? My transfer time is 2 h.... On my way back I have the same fly, but my transfer time is 1 h and 30 min. It is enough time? I don´t need to pick up my luggages in Beijing, they will fly from Copehange to Tokyo and back.
Many thanks.