In the face of increasingly complex and serious global challenges, no country can stand aloof or deal with them alone. As the most representative and authoritative inter-governmental organization, the United Nations has traveled an extraordinary course in the past 75 years and forged ahead for world peace and development. As the world's largest developing country and a permanent member of the UN Security Council, China has actively participated in international cooperation to combat climate change and has been a strong supporter of UN peacekeeping operations.