A mainland spokesperson on Friday urged the ruling Democratic Progressive Party authorities of Taiwan to stop their groundless accusations and verbal attacks over a draft decision related to national security legislation for the Hong Kong Special Administrative Region.

The draft decision, on establishing and improving the legal system and enforcement mechanisms for the Hong Kong SAR to safeguard national security, was submitted to the National People's Congress, China's top legislature, for deliberation on Friday.

The DPP authorities on Friday slandered the "one country, two systems" principle, saying the draft bill undermines rule of law and "freedom" in Hong Kong.

Ma Xiaoguang, spokesman for the State Council's Taiwan Affairs Office, said it is necessary and important to establish and improve the legal system and enforcement mechanism for the HKSAR to safeguard national security at the national level.

It aims to firmly safeguard China's sovereignty, security and development interests, maintain the long-term prosperity and stability of the HKSAR and ensure the "one country, two systems" principle will not change, he said.

The DPP authorities and "Taiwan independence" forces have been in collusion with "Hong Kong independence" forces and international anti-China forces to meddle in Hong Kong affairs, Ma said, adding they will never succeed.

Ma urged the DPP and its authorities to immediately stop their indiscriminate attacks on the bill and their political manipulation of Hong Kong affairs.

"We hope some political forces on the island will make a clear distinction between right and wrong and do more to contribute to the prosperity and stability of Hong Kong and the peaceful development of cross-Straits relations," he said.