China, as the world's largest renewable energy producer, has helped reduce the average cost of electricity for global wind power projects by 60 percent and solar photovoltaic projects by 80 percent over the past decade, said Wang Hongzhi, head of the National Energy Administration. Over the past decade, China has cooperated with more than 100 countries and regions on green energy projects, he said during the International Forum on Energy Transition held in Suzhou, Jiangsu province on Friday. China's tech cu ...