Bingo.I think that bomber formation is more of simulated mopping up exercise against hostile enemy navy forces operating east of Taiwan after an initial AShBM alpha strike.
Fighters are there to deal with any surviving CAP from the carriers and/or fighters from Taiwan, J16s are there for the same and SEAD/DEAD against land based SAMs, and ASW MPA is there to try their luck to see if they can catch and kill the obligatory enemy SSN that always operates with CSGs while they are out there.
For an alpha strike against Taiwan, I would expect that to come via ground based cruise and ballistic missiles as well as longer ranges MLRS as opposed to massed air.
The air assets will take off at the same time as the initial missile strike to maximise element of surprise and to capitalise on the initial strike to deliver the crippling death strike while enemy defences are still reeling/reloading after the initial missile strikes.
UCAVs will move in as a third wave to effectively lock in earlier gains by providing real time 24/7 monitoring of key instillations like airfields to ensure repair work does not happen, and to mop up any assets that survived the initial strikes. Same with SAM and AShBM sites and even highway stretches pre-prepared as emergency runways.
Realistically, I would expect the PLA to achieve similar air dominance as the allies did during desert storm and Kosovo within the first 24-72 hours, with naval interdiction flights like the one described above viable from thereafter since Taiwan’s ground based air and SAM forces are expected to be destroyed or thoroughly suppressed by then to allow such forces to operate east of Taiwan without too much risk from Taiwan itself.