Firms will leave China once democracies around the world make a multi-lateral trade agreement and put our money elsewhere that's aligned with our core beliefs including or primarily free speech, say India. Get the agreement in place, have it come into effect in 2 years ahead of time, provide investment grants or loans to businesses (globally if they're aligned with democracy/free speech) who want to manufacture whatever will fill a gap in production for what the 80% of what consumers buy currently from China.

CCP could easily prevent this redirection of resources by allowing free speech and having elections.