China’s Commerce Ministry issued a ruling May 24 that U.S. government support for six renewable energy projects violated free-trade rules. The two countries have pledged to work together to develop renewable sources, but are currently accusing each other of improperly subsidizing or protecting their manufacturers. The announcement of the results of an investigation launched in November, two weeks after Washington announced an antidumping probe of Chinese solar power equipment, gave no indication as to whether Beijing might try to impose punitive measures.