Hong Kong democracy activist describes how Chinese government targets critics in exile

Summary: For over 20 years, it was understood that Hong Kong was part of China, but it ran its own affairs. Hong Kong residents had many freedoms that mainland Chinese did not. That all started to change four years ago as Beijing cracked down on pro-democracy activists. China is now trying to extend the reach of its repression by targeting critics living in exile. John Yang discussed more with Elmer Yuen. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders