1. national defense and national security: national defense is the basis of safeguarding national security, and national security is the most fundamental interest of a country. The existence and development of national defense forces is the key to protect the country from external threats, safeguard national territorial integrity and domestic peace.

2. National defense and foreign relations: National defense forces and foreign policy are interrelated. Diplomatic means in international affairs usually cooperate with national defense. The stability and cooperation of normal diplomatic relations are conducive to safeguarding national security and reducing the risk of conflict.

3. Relationship between national defense and social stability: National defense affairs are also of great significance to maintaining social stability and domestic harmony. A good national defense system can maintain the country's social order, harmony and stability, ensure the safety of people's lives and property, and provide guarantee for the country's long-term development.

4. The relationship between national defense and national development: national development and national defense force construction complement each other. National defense construction is to ensure the long-term stability of national development, and the development of national economy, science and technology, culture and other fields also provides strong support for national defense.

National defense and national progress:

1. Entering a new era, China has made new progress in international military cooperation with neighboring countries. First, military mutual trust is deepening. The People's Liberation Army of China has strengthened high-level exchanges, strategic consultations and professional exchanges with the defense departments and armies of neighboring countries, promoted the construction of the Shanghai Cooperation Organization and the security cooperation mechanism, and continuously deepened the new security partnership with neighboring countries.

2. Pragmatic cooperation and expansion. China regularly holds a series of joint exercises and trainings with neighboring countries on bilateral and multilateral counter-terrorism, peacekeeping, rescue, maritime safety, service tactics, etc., and extensively carries out exchanges on border and coastal defense, think tanks in universities, education and training, medical and health care, equipment and technology, and constantly enriches China's defense relations with neighboring countries. Third, anti-epidemic cooperation has achieved remarkable results.

3. After the COVID-19 outbreak, the People's Liberation Army of China expressed sympathy and support to the defense departments and military leaders of neighboring countries, and provided material assistance to each other; At the request of the countries concerned, China also sent military epidemic prevention experts to some neighboring countries and held video conferences to share the experience of epidemic prevention and control.