French President Emmanuel Macron welcomes Ukrainian President Volodymyr Zelensky as he arrives at the Elysee Presidential Palace to attend a summit on Ukraine in Paris, France, Dec. 9, 2019. Ukraine and Russia agreed on a full and comprehensive implementation of the ceasefire in eastern Ukraine before the end of 2019, leaders of Russia, Ukraine, France and Germany announced in Paris on Monday evening following their talks called "Normandy four summit". (Photo by Jack Chan/Xinhua)