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Hong Kong's new security law explained

China has imposed a national security law on Hong Kong which changes many things for citizens in the territory.

It introduces new penalties - up to life in prison - for offences including advocating for Hong Kong's independence.

Critics have called it "the end of Hong Kong", but supporters say it is needed to stamp out the chaos of anti-government protests.

China correspondent Stephen McDonell explains what the law means, and what people there think.

Video by Edward Lawrence.

Read more: China's new law: Why is Hong Kong worried?