The media mogul and prominent pro-democracy activist Jimmy Lai has been sentenced to 20 years in prison in Hong Kong for national security offences. His family has described the sentence as ‘heartbreakingly cruel’, given the 78-year-old’s declining health. Lai was convicted in December on charges of sedition and conspiracy to collude with foreign forces, after pleading not guilty to all charges. Lucy Hough speaks to the Guardian’s senior China correspondent, Amy Hawkins – watch on YouTube