Legal analysis: the national defense obligations that China citizens should undertake include: 1, the obligation to perform military service, and the obligation to support the construction and reform of the people's army; 2, the obligation to support the militia and reserve construction; 3, the obligation to participate in the war; 4. the obligation to support the army and the family; 5, the obligation of military and civilian defense; 6. Obligation to keep state secrets; 7, the obligation to protect national defense projects and facilities; 8. The obligation to develop production and enhance the country's economic strength.

Legal basis: Article 55 of the Constitution of People's Republic of China (PRC) is the sacred duty of every citizen in People's Republic of China (PRC) to defend the motherland and resist aggression. It is the glorious duty of People's Republic of China (PRC) citizens to perform military service and join militia organizations in accordance with the law.

Article 55 of the National Defense Law of People's Republic of China (PRC) citizens shall receive national defense education. Citizens and organizations shall protect national defense facilities and shall not destroy or endanger them. Citizens and organizations shall abide by the confidentiality provisions, and shall not disclose state secrets in national defense, and shall not illegally hold secret documents, materials and other secret articles in national defense.