https://www.techdirt.com/articles/20200706/13265344846/hong-kongs-national-security-law-allows-police-to-censor-internet-compel-decryption.shtml

The national security law the Hong Kong government passed solely with the intent of shutting down protests and local dissent is amazingly bad. It criminalizes secession, subversion, terrorism, and foreign interference. Violators of any of these purposely vaguely defined terms face potential life imprisonment.

Demonstrators protesting against China's refusal to respect the rights of Hong Kong residents -- something it agreed to do when it took possession of the region in 1997 -- have already begun their self-censorship, unsure what words or actions could trigger criminal charges. Prominent pro-democracy figures are fleeing the country and the Hong Kong government is ridding its libraries of pro-democracy writings.