Research by The Washington Post shows that information from Facebook, Twitter and other Western social media is used by Chinese government agencies such as the military and police. It was already known that residents of China are closely monitored online. However, the American newspaper has now obtained more than 300 contracts signed by the Chinese authorities since the beginning of last year. This shows that the systems are also used to track foreigners. Among other things, a list is kept of foreign journalists and scientists who post about Hong Kong and Taiwan. A police intelligence program also analyzes Western rumors...