Try UPS, cheaper than fedex (but still pretty expensive). If you have a lot of stuff to ship you can ship by sea, seems it's even cheaper now with the global crysis, but it will take more than one month.

in any way dont use shipping by sea.
it takes more than 3 months to arrive

as i said
mine is over 3 months and has still not arrived

Here are a couple of links of moving companies:

http://www.santaferelo.com/ecs/index.jsp
http://linksmoving.asia/index.php?option=com_content&view=frontpage&Item...

There are many and the big moving companies in your home country will also be able to help you. And there is of course China Post (EMS) which I have used to send stuff to Sweden without problems.

Contact them and get a quote. Prepare for about 300 euros per cubic meter inluding everything (packing, door to door service etc).

Any idea how much a ordinary large duffel bag would cost to go back to the States?

I highly recommend www.sevenseasworldwide.com
I´ve sent all my stuff I couldn´t take on the airplane with them to Germany. The total costs for 60 kg (2 large boxes) were 250 EUR. Their service is very good since it includes the delivery of all the packaging materials needed (even a pen to write on the boxes) three days before they come again to pick-up your boxes. Every time they came to my house they called before - in English. If you call them yourself it is a free toll number. They estimated 10 weeks but the boxes were home at my house within 7 weeks. My boxes included two big porcelain vases and everything arrived well. They also handle customs so you don´t have to worry (just sign the papers that everything is your personal belonging for more than 6 months). At home they delivered the consigment to my former address but I had moved in the meantime (400 kms away). Usually you have to pay a small amount for changing the delivery address but I told them after the arrival note in my father´s mail box. So one day later the boxes arrived by UPS for free at the new address. I was highly satisfied with their service and the speed, and I found the price very reasonable. And the more boxes you send, the cheaper it gets. Just give it a try

Yeah, it is easy just like that. You only have to state that you lived there longer than 6 months and that these things are your personal belongings. In this case it is a remove, so no taxes or anything incur. But - of course - you cannot put in the boxes things to declare like cigarettes, parfums or other such items.The paper work is not too much. They deliver the necessary documents with the empty boxes. AND note: This is for shipping to the EU. About other countries I don´t know. But you can read on their site. While being in Beijing other foreigners recommended "seven seas worldwide" to me and it was the best choice.

Sorry for resurrecting old post but wanted to share experiences with linksmoving which I'm in the middle of using. Don't use them. They'll take their time sending stuff and try to sting you with extra 'customs' and 'biosecurity' charges. I can't wait to see if I actually get all my stuff.