@Bin Zhao (PACTERA TECHNOLOGIES INC)
There are two parts to this question. First please go through below document for checking more information about the Gateway Migration:
You need to check if you are impacted and then make the changes as needed. Also go through this list for regional gateways. Additionally this issue was discussed in few others threads : Thread1, Thread2, Thread3
Please go through these documents for more information and get back to us if you need more guidance in this regards.
Thanks
Navtej S