The national security legislation for Hong Kong is designed to ensure steady implementation of "one country, two systems" in the special administrative region, as well as upholding its long-term stability and prosperity, Premier Li Keqiang said on Thursday.

Li made the remarks at the press conference following the closing of the third session of the 13th National People's Congress, the nation's top legislature.

His comment came as the session just adopted the decision to establish and improve a legal framework and enforcement mechanism for safeguarding national security in Hong Kong.

Li said that the principle of "one country, two systems" is the country's basic policy and the central government has always stressed the need to fully and faithfully implement the principle, under which Hong Kong people administer Hong Kong with a high degree of autonomy.

The central government has also underlined the importance of acting in strict accordance with the Constitution and the Basic Law, and supported the HKSAR government and the chief executive exercising governance according to the law, he added.