China is undoubtedly the top supplier of goods in the world. Of all the goods that the USA imports, 18% are from China. The two countries have had great trade relations for quite a long time. With the high number of people and companies shipping goods from China to the US, every importer strives to get the cheapest shipping rates.
As an importer, it is important to note there is no specific cheapest shipping method from China to the US, as it all depends on what you are shipping.