All these posts about freedom and moral righteousness. It's actually very simple. Hong Kong is the meat in the Sandwich of a great power struggle. The struggle is not a struggle between 800lb Gorillas (USA and China) it's a struggle of one growing silverback (China) against a coalition of others (USA, UK, China, India, Australia etc.) who are growing tired of it's tyrannical, coercion.
Hong Kong will no longer be relevant in the world and, as long as China remains communist, they and their growth will be contained. Manufacturers are already leaving and many business interactions with China are being made illegal.
If I was in Hong Kong, I'd get out while I still could.