U.S. President Donald Trump has taken a harder stance on China.
The president on Tuesday issued an executive order and signed legislation that holds China accountable for what he called its "oppressive actions" against Hong Kong.
The executive order issued by Trump would end preferential treatment for Hong Kong.
Hong Kong's status as China's global financial hub would be gone and the territory would be treated the same as mainland China, with no special economic treatment and no export of sensitive technologies.
He also signed into law legislation that would hold China responsible for imposing a new national security law that's widely seen as depriving Hong Kong of its autonomy.
"This law gives my administration powerful new tools to hold responsible the individuals and the entities involved in extinguishing Hong Kong's freedom."
The legislation, which was passed through Congress earlier this month, will impose sanctions on Chinese government officials for imposing the security law, and banks doing business with those officials could also be sanctioned.
Following Trump's announcement, China's Foreign Ministry released a statement on Wednesday, claiming that the U.S. legislation interferes in China's internal affairs, and seriously violates international law.
The ministry also warned China would make "necessary responses to protect its legitimate interests."
Meanwhile, China's new security law raises questions as to whether Hong Kong can remain as a leading media hub.
The New York Times said some of its staff have faced problems in securing work permits, and will move some of its Hong Kong office to Seoul, which is seen as a favorable location due to its freedom of the press.
The New York Times' digital editing team which is about one third of its Hong Kong staff will move to Seoul over the next year.
Kim Jae-hee, Arirang News.