Hi Jie,
Here's a link to a great article with tips on how to save on international shipping:
Link hidden: Login to viewUpon searching, I bumped into this interesting site. You might want to have a look. Here's the link.
Link hidden: Login to viewIf you are looking at buying in bulk and importing to Canada, please click on this link:
Link hidden: Login to viewHope that helps!
Cheers,