The National Security Office in Hong Kong is responsible to the Central People's Government in some cases.

According to the Law of the People's Republic of China (PRC) Special Administrative Region on Safeguarding National Security, when performing their duties, state security agencies stationed in Hong Kong must abide by the Constitution and laws, safeguard national security, and safeguard the rights and freedoms enjoyed by residents of the Hong Kong Special Administrative Region in accordance with the Basic Law of the Hong Kong Special Administrative Region, the International Covenant on Civil and Political Rights and the International Covenant on Economic, Social and Cultural Rights as applied to Hong Kong, including freedom of speech, press and publication, freedom of association, assembly, procession and demonstration.

Tung Chee-hwa and Leung Chun-ying, Vice Chairmen of the CPPCC National Committee, Carrie Lam Cheng Yuet-ngor, Chief Executive of the Hong Kong Special Administrative Region and Chairman of the National Security Council, Luo Huining, Deputy Director of the Hong Kong and Macao Affairs Office of the State Council, Director of the Hong Kong Liaison Office and National Security Advisor of the National Security Council of the Hong Kong Special Administrative Region, jointly unveiled the Hong Kong National Security Office with Zheng Yanxiong, Director of the Hong Kong National Security Office. The Hong Kong National Security Office will become an important partner of the SAR Government in safeguarding national security.

Luo Huining said in his speech that the promulgation and implementation of Hong Kong's National Security Law opened a major turning point from chaos to governance in Hong Kong. The establishment of the National Security Office in Hong Kong is an important measure for the central government to fulfill its fundamental responsibility of safeguarding national security. National security belongs to the central government, which has the power and responsibility to take all necessary measures to safeguard national security. Based on full trust in the Hong Kong SAR, the central authorities authorized the SAR to manage most cases. The reason why the Central Committee reserves jurisdiction over a few cases that endanger national security under certain circumstances is to keep the bottom line of Hong Kong's safeguarding national security.

Luo Huining emphasized that the national troops stationed in Hong Kong, as an agency of the central government, will definitely perform their duties in Hong Kong in strict accordance with the law and accept supervision according to the law, and will not infringe upon the legitimate rights and interests of any individual or organization. She is a "messenger of Hong Kong security" and a "gatekeeper of national security".

To sum up:

The National Security Office in Hong Kong is responsible to the Central People's Government in some cases. At the same time, we must abide by the Constitution and laws, safeguard national security, and safeguard the rights and freedoms of Hong Kong residents according to law.

Legal basis:

The Law of the People's Republic of China (PRC) Special Administrative Region on Safeguarding National Security stipulates that when performing their duties, national security agencies stationed in Hong Kong must abide by the Constitution and laws, safeguard national security and safeguard the rights and freedoms enjoyed by residents of the Hong Kong Special Administrative Region in accordance with the Basic Law of the Hong Kong Special Administrative Region, the International Covenant on Civil and Political Rights and the International Covenant on Economic, Social and Cultural Rights as applied to Hong Kong.