I got a message from China Post saying there was a package.

I received a few before, and then called the post office. Comrades in the post office told me that the package did exist, but it was deceptive. You have to pay when you take it. When you open it and find that you have been cheated, the money can't be refunded. So I can ignore it and they can return the package. Actually, think about it. If your friends or relatives really give you something, they should tell you in advance, so that you can ignore this kind of thing and send it back if it is a big deal.