My personal take for HK Citizens: Get out!
You are not going to win against CCP in this scenario. They have bigger army diplomacy AND they don't have rule of law.
Continue protesting, but figure away out, and Get out!
By staying, you are helping the CCP. You work, spend, and play in HK, you are giving the CCP money and power to continue doing this to you. By leaving, you take value out of the equation.
When people leave en masse. You can then form groups and communities elsewhere. Tell people of your plight, teach your kids the lessons you learned, and take on the CCP from a better position.