Profound changes are taking place in the international situation, as manifested in the historic changes in the balance of power, global governance structure, Asia-Pacific geostrategic landscape, and international competition in the economic, scientific and technological, and military fields. The forces for world peace are on the rise, so are the factors against war. In the foreseeable future, a world war is unlikely, and the international situation is expected to remain generally peaceful. There are, however, new threats from hegemonism, power politics and neo-interventionism. International competition for the redistribution of power, rights and interests is tending to intensify. Terrorist activities are growing increasingly worrisome. Hotspot issues, such as ethnic, religious, border and territorial disputes, are complex and volatile. Small-scale wars, conflicts and crises are recurrent in some regions. Therefore, the world still faces both immediate and potential threats of local wars.

With a generally favorable external environment, China will remain in an important period of strategic opportunities for its development, a period in which much can be achieved. China's comprehensive national strength, core competitiveness and risk-resistance capacity are notably increasing, and China enjoys growing international standing and influence. Domestically, the Chinese people's standard of living has remarkably improved, and Chinese society remains stable. China, as a large developing country, still faces multiple and complex security threats, as well as increasing external impediments and challenges. Subsistence and development security concerns, as well as traditional and non-traditional security threats are interwoven. Therefore, China has an arduous task to safeguard its national unification, territorial integrity and development interests.

As the world economic and strategic center of gravity is shifting ever more rapidly to the Asia-Pacific region, the United States carries on its "rebalancing" strategy and enhances its military presence and its military alliances in this region. Japan is sparing no effort to dodge the post-war mechanism, overhauling its military and security policies. Such development has caused grave concerns among other countries in the region. On the issues concerning China's territorial sovereignty and maritime rights and interests, some of its offshore neighbors take provocative actions and reinforce their military presence on China's reefs and islands that they have illegally occupied. Some external countries are also busy meddling in South China Sea affairs; a tiny few maintain constant close-in air and sea surveillance and reconnaissance against China. It is thus a long-standing task for China to safeguard its maritime rights and interests. Certain disputes over land territory are still smoldering. The Korean Peninsula and Northeast Asia are shrouded in instability and uncertainty. Regional terrorism, separatism and extremism are rampant. All these have a negative impact on the security and stability along China's periphery.

The Taiwan issue bears on China's reunification and long-term development, and reunification is an inevitable trend in the course of national rejuvenation. In recent years, cross-Taiwan Straits relations have sustained a sound momentum of peaceful development, but the root cause of instability has not yet been removed, and the "Taiwan independence" separatist forces and their activities are still the biggest threat to the peaceful development of cross-Straits relations. Further, China faces a formidable task to maintain political security and social stability. Separatist forces for "East Turkistan independence" and "Tibet independence" have inflicted serious damage, particularly with escalating violent terrorist activities by "East Turkistan independence" forces. Besides, anti-China forces have never given up their attempt to instigate a "color revolution" in this country. Consequently, China faces more challenges in terms of national security and social stability. With the growth of China's national interests, its national security is more vulnerable to international and regional turmoil, terrorism, piracy, serious natural disasters and epidemics, and the security of overseas interests concerning energy and resources, strategic sea lines of communication (SLOCs), as well as institutions, personnel and assets abroad, has become an imminent issue.

The world revolution in military affairs (RMA) is proceeding to a new stage. Long-range, precise, smart, stealthy and unmanned weapons and equipment are becoming increasingly sophisticated. Outer space and cyber space have become new commanding heights in strategic competition among all parties. The form of war is accelerating its evolution to informationization. World major powers are actively adjusting their national security strategies and defense policies, and speeding up their military transformation and force restructuring. The aforementioned revolutionary changes in military technologies and the form of war have not only had a significant impact on the international political and military landscapes, but also posed new and severe challenges to China's military security.