I tried a search but couldn't find anything, so I have to ask.

I am planning a trip to China this year where we will be staying in several Hyatts (definitely Beijing, probably Xian, and unlikely, but possibly, Shanghai). Most have two rooms on the reservation.

Between the two rooms and all the time, I will likely have over 40 nights. Now, how much tier credit will this get me? If I will get it for all 40 nights, I might run to my local Amerisuites (soon to be Hyatt Place) and get some double stay credits. Or am I only going to get credit for one room? Please advise. Thanks