So package from China to USA costs much much less than other way around because of an International treaty. More details on treaty is in this article but I stil

So package from China to USA costs much much less than other way around because of an International treaty. More details on treaty is in this article but I still don't get it why this treaty was made in first place: https://www.washingtonpost.com/news/storyline/wp/2014/09/12/the-postal-service-is-losing-millions-a-year-to-help-you-buy-cheap-stuff-from-china https://www.washingtonpost.com/news/storyline/wp/2014/09/12/...