April 15 is National Security Day. National security refers to the ability of state power, sovereignty, unity and territorial integrity, people's well-being, sustainable economic and social development and other major national interests to be relatively free from dangers and internal and external threats, and to ensure a continuous state of security.

China's national security mainly includes political security, homeland security, military security, economic security, cultural security, social security, scientific and technological security, network security, ecological security, resource security, nuclear security, overseas interests security, space security, deep sea security, polar security and biological security. "12339" is the telephone number that the state security organs receive reports from citizens and organizations. This hotline is set up by the Ministry of National Security to facilitate citizens and organizations to report espionage or clues to the state security organs.

Article 77 of the National Security Law stipulates that citizens and organizations shall perform the following obligations to safeguard national security:

(1) Abide by the relevant provisions of the Constitution, laws and regulations on national security.

(2) timely report clues that endanger national security activities.

(3) Truthfully providing known evidence of activities endangering national security.

(four) to provide convenience or other assistance for national security work.

(5) Providing necessary support and assistance to state security organs, public security organs and relevant military organs.

(6) Keeping known state secrets.

(seven) other obligations stipulated by laws and administrative regulations.

No individual or organization may commit acts that endanger national security, or provide any financial assistance or assistance to individuals or organizations that endanger national security.