The Trump Administration announced plans back in October 2018 to withdraw from the Universal Postal Union (UPU) treaty. This was largely an attempt to level the playing field between Chinese and US businesses. Postal rates for Chinese packages to the US were discounted, giving Chinese businesses what many called an “unfair advantage.”
However, member countries managed to reach a deal and come up with a revised UPU treaty which satisfied US negotiators and goes into effect on July of 2020. There will of course be changes to international shipping prices, which will affect many e-commerce companies that import their products to the US, as well as US companies that ship internationally.
Red Stag Fulfillment has written a comprehensive article that looks at how shippers can prepare their businesses for these changes.