Every single computer that the above comments have been typed on, has been manufactured in China. And they've all been shipped all over the world in freight containers. Wrap things in a plastic bag, put them in a cardboard box and let the moving company take care of it. Don't worry about temperature, humidity, etc - just make sure what you pack is dry or you'll be greeted by a big furry mass when opening the boxes.
There is a remote chance that the container will get lost. Assume 5000 boxes on a large vessel. One might get lost during a voyage, on average. So divide the value of your belongings by 5000 and that's, on average, what you should be paying on insurance, likely less than more.
And it's worth doing some research and use a reputable moving company. Skimping a few dollars and not getting your stuff is not worth it.