The Stop Online Piracy Act (SOPA) has nothing to do with foreign companies. A foreign company (Chinese or any other) are not subject to American laws. The product example above (Headphonies) would already be protected by US patent and trademark laws which also have no teeth outside of our borders. SOPA is simply a way for MPAA and RIAA to offload the costs of protecting content and costs of prosecuting those who infringe their copyright to the government and by extension everyone in the USA. In effect you will be paying to prosecute yourselves and in combination with other laws, such as the Digital Millennium Copyright Act, will almost eliminate you right to fair use of the content you purchase. Just do a search for MPAA Lawsuits and the plan becomes a little clearer. You can start here if you like:
http://news.cnet.com/8301-31001_3-20025357-261.html 
