This was reported by RIA Novosti with reference to the Chinese Foreign Ministry.
The Foreign Ministry said that "the US bill maliciously denigrates the Hong Kong National Security Act, contains threats to impose sanctions on China, seriously violates international law and basic norms of international relations, and is a gross interference in the affairs of Hong Kong and the internal affairs of China."
The Foreign Ministry said that "in order to protect its legitimate interests, China will take the necessary retaliatory measures and impose sanctions against US citizens and American organizations related to this (adoption of the law. - RT )."
Earlier, US leader Donald Trump announced the signing of the law and a presidential decree to hold China accountable for its actions against Hong Kong.