A national security law is coming to Hong Kong. Here's how it has been used to crush dissent in China - CNN

Residents of Hong Kong only need to look across the border at China to get a glimpse of how "national security" can be used as a convenient pretext for the political prosecution of dissidents, activists, human rights lawyers and journalists. https://www.cnn.com/2020/05/22/asia/china-national-security-law-prosecution-intl-hnk/index.html