Jean-Pierre Lacroix (C, Front), UN Under-Secretary-General for Peacekeeping Operations, attends a Security Council meeting on peacekeeping operations, at the UN headquarters in New York, June 18, 2019. UN peacekeeping operations must adhere to the purposes and principles of the UN Charter and the fundamental principles of peacekeeping operations, said Wu Haitao, China's deputy permanent representative to the United Nations. (Xinhua/Li Muzi)