One-China policy is no more defacto, only dejure.
Some people here are still in denial because on paper some 10 little countries only recognize Taiwan, while in actual one China policy has been completely hollowed out.
The frog is in the water and the water is heating up, frog is being told exactly what's happening, but frog will issue final warnings.
China will need to do more than issue statements.
I think:
1. They've seen the playbook being used against Russia. Prepare counters now.
2. Resolve all outstanding disputes at southern border and SCS. I think other than Japan, other nations would rather resolve and stay out of a a shooting war between US and China over Taiwan.
3. Increase Nukes.
4. Be prepared to counter 'color revolutions' in the neighborhood or prepare their own. Look at Sri Lanka as a failed example of BRT. You keep the hen for eggs, not kill it for the meat. Learn the lessons there.
5. Lots of moves in Central Asia going on, between Turkey, Russia, Iran and US. It would be sad if suddenly a hostile neighbor appears on the western border too.