The so-called "humanitarian aid" plan offered by the Democratic Progressive Party on the Taiwan island to rioters escaping from Hong Kong exposed its attempt to undermine the city's prosperity and stability, a mainland spokeswoman said on Friday.

The island authorities on Thursday announced a "humanitarian aid plan" for rioters fleeing the Hong Kong Special Administrative Region after the National People's Congress, China's top legislature, passed a decision to introduce a national security law for the HKSAR in late May.

Under the plan, the island administration will help with residency, settlement, employment and protection issues for those fleeing Hong Kong.

The so-called aid plan by the DPP once again exposes its political aim to meddle in Hong Kong's affairs and undermine its prosperity and stability, Zhu Fenglian, a spokesperson for the State Council Taiwan Affairs Office, said in a statement on Friday.

"Providing shelter to the rioters will only harm the residents of the island," she said. "The attempt of 'Taiwan independence' and 'Hong Kong independence' separatists to undermine the 'one country, two systems' principle and split the country will never succeed."