Employees carry solar panels at a solar power plant in Aksu, Xinjiang Uyghur Autonomous Region May 18, 2012. The United States hit Chinese solar companies with punitive import tariffs of 30 percent or more on Thursday, ruling they had dumped cut-price solar panels on the U.S. market. REUTERS/Stringer (CHINA – Tags: ENERGY ENVIRONMENT BUSINESS) CHINA OUT. NO COMMERCIAL OR EDITORIAL SALES IN CHINA – RTR328GN