A copy of the Hong Kong Special Administrative Region (HKSAR) passport, left, with British National (Overseas) passport arranged in Hong Kong, China, on Saturday, Jan. 30, 2021. Prime Minister Boris Johnson estimates about 300,000 Hong Kong citizens will take advantage of a new visa route to leave the former British colony and settle in the U.K., despite nearly three million people being eligible. Photographer: Paul Yeung/Bloomberg
Left, a Hong Kong Special Administrative Region passport and a British National (Overseas) passport, right, which offers Hong Kongers a path to UK citizenship. Bloomberg

Britain opens visa scheme for millions of Hong Kongers