China has taken another step to expedite residents' trips between the Chinese mainland and the Hong Kong and Macao special administrative regions by introducing "certificate-free" clearance for travelers.

The National Immigration Administration said in a statement on Friday it has chosen the Shenzhen Bay Port and the Gongbei Port, both in Guangdong province, to exercise the new approach.

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From Wednesday, residents in the mainland aged 14 years and above, who have a valid travel document to Hong Kong and Macao, as well as an endorsement for multiple-entry to Hong Kong or Macao, will be able to pass the two ports without showing the paperwork.

Instead, they need to undergo fingerprint and facial checks for clearance, the administration said.

The case is the same for Hong Kong and Macao residents aged 14 and above, who have a valid mainland travel permit, including non-Chinese residents.

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The measures are introduced to further facilitate travel between the mainland and Hong Kong and Macao, the administration said, adding that the measures do not suit mainland residents who have a permit for exit and entry for public affairs.