Fourteen prominent pro-democracy activists have been found guilty in a landmark subversion trial in Hong Kong. They were among the 47 opposition figures arrested under the Beijing-imposed National Security Law and charged with trying to overthrow the government by organising an unofficial primary for the 2020 legislative election. While Beijing and the Hong Kong government welcomed the verdict, rights groups have voiced deep concern. FRANCE 24's Yuka Royer speaks to Sarah Brooks, China Director at Amnesty International.