Originally Posted by
moondog
I've never taken that specific flight, but I have done similar via DLC, PVG, and XMN several times:
1) You'll "enter" China in Hefei
-this process is really easy (fast) in DLC and XMN
2) Your bags will be checked through to Chengdu
-if you do have to go through any sort of customs formalities (unlikely), Chengdu is where it will happen