Ming Sing

As long as they don't strive for independence of Hong Kong with a large number of people, and push mainlanders to revolt against the Chinese Communist Party, I believe the red line is still quite far away.

If she resigns right now, if she is compelled by Beijing to resign, that would send a very strong signal to Hong Kong and the international community that Beijing, the largest one-party state, the largest authoritarian state in the world, would back down in the face of popular pressure.