In 2017 the number of major armed conflicts around the world declined，but in some key areas they still remained serious. The Islamic State lost most of its occupied territory，but the Middle East was about to enter a new round of political turmoil. Terrorism was on the rise in many regions，and cyberspace was becoming a new battlefield for anti-terrorism. Global refugees and immigrants required greater efforts by the international community. Along with the diversifying trends in international patterns，relations among the major countries gradually achieved a new momentum. The United States and China enjoyed a high degree of interdependence and such mutually-beneficial cooperation will benefit the two countries as well as the entire world；the comprehensive strategic cooperation between China and Russia deepened to take new initiatives；US-Russian relations grew tense，but the conflicts remained under control. China’s border situation was complicated and changeable，especially with the escalation of the Korean nuclear crisis and the resurge in the Sino-Indian border dispute. China consistently adhered to the path of peaceful development and pursued an open strategy featuring win-win cooperation and demonstrating the new diplomatic thought and image of China during the new era.