Hi.. I have a question or two. If I book a round trip flight from the US to Nanning and have to pass thru Shanghai will I have any problems? Some flights say that I will have to change airports in Shanghai. Typically I saw a four hour stay in Shanghai. What will happen to my baggage? Will it be transferred for me in Shanghai or do I have to pick it up and lug it to the other airport? I have never past thru Shangahi below. Thanks for any info that you can give me. Danb