I believe China should make the move on Taiwan province by 2025. while Taiwanese military is still in dissaray and Americans haven't had enough time to completely brainwash and radicalize Taiwanese as they managed with Ukrainians. The status quo in which West (primarily U.S.) is making a mockery out of Chinese territorial integrity and sovereignty by sending delegations to Taiwan province, providing them with arms, discussing trade deals, having military presence on an island and by supporting Taiwanese presence in international organizations etc is unsustainable and cannot be allowed to last. If Lai Ching-te (whose views are even more radical than Tsai's) is elected next year then I believe that efforts to achieve peaceful reunification should be abandonded.
If government forces start firing at rebels, it will likely mean hundreds of thousands citizens dead, ofc most will be hanjian but some civilians will also be caught in the crossfire.
China still maintains de facto control and that is the most important factor. The rebels themselves are not dangerous, but the danger comes from a Donbass situation arising where US can send troops into China under the guise of "protecting self determination".
Rather than restarting the civil war, China should consider declaring martial law, in Taiwan only. Force all shipping and flight to pass inspections and/or stop on Fujian first. That way, they will prevent Americans from arming anti government forces and at the same time starve KMT out.
I just see Phillipenes as a location for the US to lob cruise missiles at Chinese naval forces attempting to blockade Taiwan. As much as posters like to believe otherwise, Russia has already expended thousands of missiles of all sorts at Ukranian infrastructure and military targets yet they are not subdued. The belief that China can simultaneously supress Taiwan and US forces in Japan, South Korea and the Philippines through long range fires alone is too optimistic imo, every new base the US constructs within the zone of conflict will require the PLA planners to reserve another massive salvo to neutralize it, making it a uneven trade.
Then you understand even more how unrealistic it is for US, which has less bombers than Russia, to even begin to threaten any Chinese province with long range fires except possibly Taiwan. But just bombing Taiwan will not achieve anything, Taiwan is not integral to Beijing's war machine. Even if the whole province is reduced to an Iraq like state between PLA air strikes on rebels and US bombing, it will not affect the mainland's gdp or industry.
China doesn't need to completely destroy all the US bases at once on day 1. It just needs to hold Taiwan and destroy incoming invaders one at a time until the whole country is on war production mode. Then, it can launch an island hopping counteroffensive on the aggressors (whether that is just US or Philippines + US or even Japan as well), once the whole industry of China is dedicated towards producing weapons and the first waves of draftees make their way into the PLA.