Regarding the stop-over, can the stop-over be in a foreign country? For example, can I fly DFW to NRT to PVG, and make a stop-over in Tokyo for one month?
Also, when you check in for the flight at DFW, you are not going to get a boarding pass for the flight from NRT to PVG, right? Because that flight is one month later! Then will the ticket number still be the same for these two legs, i.e., DFW-NRT and NRT to PVG?