Similarly, in the US, the Chinese sellers take advantage of the UPU shipping subsidies to artificially undercut sellers from other countries.

"the USPS actually charges China Post less to deliver a package from China into the U.S. than it charges a U.S. business or customer to deliver a similar size package within the 48 states"

http://www.nationalreview.com/article/439532/us-postal-servi...