Shopkeepers wait for customers at a store selling pirated DVDs in Beijing April 24, 2007. U.S. complaints to the WTO over commercial piracy in China will "badly damage" cooperation, Vice Premier Wu Yi warned on Tuesday, insisting that China has made great strides in protecting patents and copyrights. Earlier this month, Washington launched two cases at the World Trade Organization claiming that Beijing was not doing enough to punish illegal copiers of films and music and that its restrictions on entertainment imports violated trade rules. REUTERS/Claro Cortes IV (CHINA)