Hong Kong police have confirmed that Chinese President Xi Jinping will visit the city this week for the 25th anniversary of the former British colony's return to Chinese rule.

Mr Xi will attend a number of official events including the inauguration of Hong Kong's next leader on Friday, Assistant Police Commissioner Lui Kam-ho said at a news conference.

Mr Xi's visit will be his first trip outside of mainland China since the COVID-19 pandemic took hold about two-and-a-half years ago.

It comes as Hong Kong is facing a new spike in infections after what was, by far, its worst and deadliest COVID-19 outbreak earlier this year.

On July 1, 1997, the United Kingdom returned Hong Kong to China.

The anniversary is highly symbolic for Mr Xi, who wants to be seen as propelling a "national rejuvenation" as — this coming fall in the northern hemisphere — he prepares to start an expected third, five-year term as head of China's ruling Communist Party.

Part of that rejuvenation is erasing the legacy of colonialism and what the party regards as unequal treaties that granted territorial concessions to Britain and other foreign nations during the waning years of the Qing Dynasty, which ended in 1911.

A series of security measures will be put in place to protect Mr Xi, including security zones and road closures around the venue for the ceremony, police said.

Barriers have already been erected in the area.

"We will not tolerate anything that may interfere and undermine the security operation," Mr Lui said.

"In the event that any person behaves in a manner that threatens life or property and undermines public order or endangers public safety, we will take resolute action."

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AP