Article 23 refers to a provision in the basic law—Hong Kong’s mini-constitution—calling for the territory to pass legislation to protect national security.

Jimmy Lai’s conviction is unjust, says former Hong Kong governor Chris Patten - Hong Kong’s top court upholds British media mogul’s conviction for role in 2019 anti-government protests ...

Civil servants, from cleaners to policymakers, will need to fulfil their duty to identify national security breaches under new guidelines that will soon be released, Hong Kong’s security chief ...

Hong Kong’s secretary for security, Chris Tang, boasts of a 100% conviction rate in national-security cases. Apparently that’s not enough.

Classes were suspended in Hong Kong, Shenzhen and other parts of southern China on Friday. But across the region, some people returned to work, despite transit disruptions.