Chinese Vice Premier Zhang Gaoli, also a member of the Standing Committee of the Political Bureau of the Communist Party of China Central Committee, addresses the opening ceremony of the Eco Forum Global Annual Conference 2013 in Guiyang, capital of southwest China's Guizhou Province, July 20, 2013. Zhang read out Chinese President Xi Jinping's congratulatory letter on the opening of the conference and delivered a speech here on Saturday. (Xinhua/Wang Ye)