Beijing's top official overseeing Hong Kong and Macau affairs, Xia Baolong, is scheduled to deliver a keynote speech via video link at the 10th National Security Education Day on Tuesday.

Organised by the Committee for Safeguarding National Security of the SAR, the ceremony and a seminar will take place at the Convention and Exhibition Centre in the morning.

In a statement, Chief Executive John Lee expressed gratitude to Xia, director of the Hong Kong and Macau Affairs Office, for his guidance and support for Hong Kong.

Lee pointed out that this year marks the fifth anniversary of the promulgation of the National Security Law, as well as the first anniversary of the implementation of the Safeguarding National Security Ordinance.

"At present, the world is undergoing unprecedented changes at an accelerating pace. The geopolitical landscape is getting complicated, regional conflicts are frequent, global economic growth is slowing down, and unilateralism and protectionism are on the rise, all contributing to increasing global instability.

"With Hong Kong faced with ever-changing national security risks, the HKSAR Government will resolutely, fully and faithfully implement the 'One Country, Two Systems' principle, deepen the understanding of a holistic approach to national security, continuously improve the legal system and enforcement mechanisms for safeguarding national security, and actively promote national security education across society," Lee said.

The CE also said the authorities will co-ordinate school and community activities to promote national security education.