"Since the inception of the new century, international situations have undergone complex and profound changes. Against the background of the in-depth development of economic globalization, interdependence among countries is continuously deepening. To peruse peace, promote cooperation and seek development has become the theme of the current era. However, our world is far from peaceful, and destabilizing and unpredictable factors are obviously growing. Blood-shed and clashes resulting from ethnic, religious, territorial issues and other traditional security factors have not become fewer and non-traditional threats to security represented by transnational crimes, epidemic diseases, terrorism and the proliferation of weapons of mass destruction are increasing day by day. Mankind is facing an unprecedented severe challenge."