Thanks for the detailed explanation.
Just a follow-up with regard to the 370mm and 300mm MRLS. I don’t recall the PLA having a large enough number of these long-range artillery pieces, yet. I could be wrong. Do you think it would be realistic to use these long-range MRLS to provide covering and suppressing fire to prevent airfields and bases from being repaired, destroy time sensitive targets in conjunction with loiter drones, etc.? The Russians could fire 30,000 rounds per day (152mm, 122mm) to suppress Ukrainian lines. I wonder if it would be realistic for the PLA to do that using PHL-191s regarding Taiwan to keep the ROC forces suppressed (think Kinmen 8.13.1958, but this time across the entire Taiwan Strait), whilst covering amphibious forces.
The use of long range MLRS would not be for suppression in the traditional sense -- at the sort of ranges that these weapons will be operating at (500+km for the 750mm ballistic missile, 300+km for the 370mm rockets), they would be precision guided.
Depending on the phase of a Taiwan conflict, they would be used for targeting high value targets and concentrations of units, logistics, fixed sites, etc.
As part of an overall fires campaign in a Taiwan conflict (including initial waves, and subsequent re-attack of degraded targets like preventing air fields and bases from being repaired), these PHL-191 systems obviously won't be operating alone, but instead with the full envelope of supporting, appropriate ranged PLA multi-domain strike systems. Ongoing strike and degradation fires will also be multi-domain rather than the sole purview of PHL-191.
By the time that an amphibious invasion occurs, the ROC military should be sufficiently degraded and the PLA should have sufficient air control over the area of operations such that the PHL-191s (likely using 370mm rockets) as well as other airborne supporting fires (fixed wing CAS/interdiction, rotary wing, as well as EW and ISR) and organic seaborne fires (ship based shorter range MLRS, naval gunfire) will have the joint task of supporting the amphibious assault itself without having to simultaneously re-attack ongoing ROC military bases/air fields/radars etc because those should have been permanently taken out by this stage.
As for the number of PHL-191 systems, they are introducing it to more units over time; what is true one year may not be true the next year. And importantly, as a very road mobile system, they can quite easily transfer a few PHL-191 units from other theater commands to eastern theater command as needed to augment their fires bandwidth.