Before the aerial campaign we should significant attack by land based missiles.Yet in WW2 Luftwaffe flew until their airfields got conquered.
The thing I have a problem with is that PLA can't wait for a few weeks of leisurely bombing like Desert Storm to suppress Taiwanese air to 0 sorties.
Right now Russia has 20x the sorties per day (~200) of Ukraine (~10). They've finished off most Ukrainian fixed wings. Yet they still take occasional losses. They only have air superiority, not air supremacy.
PLAAF is more capable than RAF but ROCAF is also more capable than UAF. Expectations need to be adjusted.
I'd say suppressing ROCAF to <10% PLAAF sorties within 3 days, <5% within 7 days, <1% within 10 days would be a good benchmark.
But in conjunction with the air suppression campaign should be a naval surface/subsurface campaign to achieve naval goals such as mining harbors, cutting undersea cables and pipelines, etc. instead of waiting.
If the PCL-181 (or whatever designation it has) really has a range of its stated 300 km (likely to be the case), it should conformtably be able to hit millitary targets west to the mountains on Taiwan (that's what? 80% of the island?).
And I would not be surprised if the number of these missile trucks are in the 100+, so a lot of damage can be done (there's also DF-17 for say patriots and other critical air/missile defense).
And the above should be able to be done in the first few opening hours, before the skies get swarmed with drones and jets.
All in all, I would say it's very safe to say that the PLA can get air superiority in like possibly less than 48 hours.