(161114) -- MARRAKECH, Nov. 14, 2016 (Xinhua) -- Xie Zhenhua, China's special representative on climate change affairs speaks at a forum on South-South cooperation during the 22nd Session of the Conference of the Parties to the United Nations Framework Convention on Climate Change (COP22) in Marrakech, Morocco, on Nov. 14, 2016. Developed countries should set a clear timeline and a roadmap for the implementation of their promise to provide 100 billion U.S. dollars each year by 2020 to assist developing countries in addressing climate change, Xie Zhenhua, China's special representative on climate change affairs, said here Monday. (Xinhua/Meng Tao) (dtf)