Ashgabat-Beijing-Osaka Route

According to your situation, it's International to Internationl Transfer (T2 to T3).

Generally speaking, you need at least two hours to complete the transfer, so your time is totally enough.

The correct procedures are the following:
1:Flight Arrival
2:Transfer Procedures
3:Border Inspection
4:Security Check
5:Custom Inspection
6:Flight Waiting and Boarding

Thanks for your reply. But agency said that our flight from Ashgabat arrive in T3 as well, and our next flight is from T3. What about T2 to T3 interchange procedure?

Actually, I've checked the official website of Capital Airport. Your flight of Turkemistan Airline is located at T2. And the procedures are correct.
In order to be sure, you can check it again with your airline. :-)

Please, can you send a web site or link, where I can check such an information ( which flight landed at which terminal)..Thanks

Well, you can search "BCIA' on the Internet. And the official website of the airport has English version. Then you can find the relevant information.