China on Tuesday said that it will take necessary countermeasures to firmly safeguard its national interests in response to the United States' decision to end special treatment of the Hong Kong Special Administrative Region (HKSAR).

Chinese Foreign Ministry Spokesperson Zhao Lijian made the remarks at a regular press briefing, adding that the so-called sanction by the U.S. side cannot stop China's determination to promote the law on safeguarding national security in HKSAR.

He reiterated that Hong Kong affairs are China's internal affairs and the country allows no foreign interference. He stressed that establishing national security law at national level to safeguard the country's national security is a well representation of the "One Country, Two Systems" principle.

Read more: Three things to watch in U.S. vow to strip HKSAR of special trade privileges

Earlier, HKSAR Chief Executive Carrie Lam said at a weekly briefing that the United States' move to end its special treatment of Hong Kong has little influence on the city.

Her remarks came after U.S. Secretary of Commerce Wilbur Ross said few hours earlier that U.S. Commerce Department's regulations giving preferential treatment to Hong Kong, including export license exceptions, have been suspended.

In a statement, Ross said further actions to eliminate differential treatment for Hong Kong were also being evaluated.

The move was threatened to be issued a month ago, when President Donald Trump said the U.S. would revoke HKSAR's special privileges following China's decision on national security legislation. The administration also said at the time it would restrict exports of high-technology products to the city which return to Chinese governance in 1997.

Read more: Trump says U.S. to begin ending Hong Kong privileges

The special treatment of Hong Kong refers to what is offered by the Hong Kong Relations Act enacted by the U.S. Congress in 1992. The act allows the U.S. to continue to treat Hong Kong separately from the Chinese mainland for matters including trade.

According to the Chinese Foreign Ministry, the U.S. has 85,000 citizens, more than 1,300 enterprises, about 300 regional headquarters and 400 regional offices in Hong Kong. The city's Financial Secretary Paul Chan believes "any restrictions will damage the interests of American companies in Hong Kong."

Former HKSAR Chief Executive Leung Chun-ying said the move made by the U.S. was "completely nonsense" while pointing out that it is a "usual scaremongering tactic" played by the U.S.

Read more: U.S. sanctions over national security law on HKSAR to be limited: finance chief

Hong Kong has the largest U.S. trade surplus in the world, the secretary noted. It is also the third largest importer of U.S. wine and the fourth largest market of beef products from the U.S.

In the briefing, Lam stressed that U.S. restrictions won't scare the HKSAR. She also noted that Hong Kong will resolutely support the central government if it takes any countermeasures on the U.S. move.

(Cover: Hong Kong SAR Chief Executive Carrie Lam speaks to the media in a weekly news briefing after local elections in Hong Kong, China, November 26, 2019. /Reuters)