BEIJING - The Hong Kong and Macao Affairs Office of the State Council on Wednesday strongly condemned the signing of the so-called "Hong Kong Autonomy Act" into law by the United States.

The Chinese government will resolutely take countermeasures in response, according to a statement released by the office.  

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The office said that the national security law is consistent with the principle of "one country, two systems" and the Basic Law, and the necessity and legitimacy of the legislation are widely recognized by the international community.

The meddling of the US in Hong Kong affairs by means of domestic law is a gross interference in China's internal affairs and a wanton trampling on international law and basic norms governing international relations.

Hong Kong and Macao Affairs Office

"The meddling of the US in Hong Kong affairs by means of domestic law is a gross interference in China's internal affairs and a wanton trampling on international law and basic norms governing international relations," according to the statement.

It fully exposes its true intention of using Hong Kong to infiltrate the Chinese mainland and contain China's development, it said.

Any so-called "sanctions" by the US will never shake the determination of China to safeguard national sovereignty, security and development interests, as well as the long-term prosperity and stability of Hong Kong, it added.

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The law has come into force and will be strictly enforced. Hong Kong is approaching a major turning point from chaos to governance, and the US interference will not succeed, the office said.

Zhang Yi contributed to this report