The "China box" I mean the one that you buy at your local moving supply store like, uhaul, mailbox etc.. etc..is a great box it is about 2.5 times thicker than your typical book, or linen box.
Here is the best way to do it.
First forget about buble wrap, it's not realy going to help you here. Just use white paper or news paper if you are on a budget.
Make sure you do not have any two item touching and that everything is "floating" in a nice way and distributed evenly.
Now this is important Overflow the box with paper and then apply some force to seal the box. You are done