When you are shipping a container to Shanghai, you'll need to assess whether you require a full container load (FCL) or groupage-(LCL, a less-than-container load).
A forty-foot container can accommodate up to 22 standard pallets, while a twenty-foot container can take ten standard pallets. If the volume of your shipment is equal to six or more standard pallets, you'll thus need FCL.
You should also choose a full container load if you are concerned about any risk of damage to your goods that contact with other exporters' goods may pose.
A shared container-groupage (LCL)-is, otherwise, a good and economical choice; it requires that you pay only for the space you need. See iContainers for information on rates and other important details.
If your schedule has some flexibility, then ocean freight transportation is an efficient and economical choice. Air freight, however, may be more appropriate to your needs if you are working against a short deadline or with an urgent shipment. Air freight does impose some limitations on shipping in terms of volume and weight; consult the calculator provided by iContainers to help you determine which is the right option for you.