How to ship bulky/heavy packages from USA to HK?

Hi. I need to buy a number of bulky items (baby furniture/supplies) from Walmart and other shops in the USA and want to have them shipped to Hong Kong.

For small packages I tend use buyandship (which charges as little as HKD22/pound) but they have weight and dimension restrictions. Can anyone recommend a shipping service that has a warehouse in the USA and can re-ship to HK at a reasonable rate?

I don't mind slow/surface shipping.