United Nations Secretary General Ban Ki-moon, accompanied by French Ecology Minister Segolene Royal (L), French Foreign Affairs Laurent Fabius (2ndL), Secretary of the UN Framework Convention on Climate change Christiana Figueres(3rdL) and French President Francois Hollande (3rdR) , welcomes Chinese President Xi Jinping as he arrives for the opening day of the World Climate Change Conference 2015 (COP21) at Le Bourget, near Paris, France, November 30, 2015. [Photo/Agencies]