This weeks Economist has a couple of articles relevant to Chinese action on Taiwan
One is the need to keep an eye on Chinese action to build/rebuild stockpiles ahead of sanctions - oil and pig food (only 3 months supply in country) are especially sensitive. So far all indications are that they're just about back to pre-CV19 levels of buying but nothing more.
Also its possible to see which airfields the Chinese are hardening - in the last ten years these have been largely well north of Taiwan around Beijing. One might start to believe they don't totally trust The Good Leader or Mr P.................................