To sum it up, the US intends for the First Island Chain (FIC) to become a missile wall directly aimed at China's core. The wall is going to be bristled with hundreds of long-range missile launchers dotted along the Ryukyu Islands, Taiwan and the Philippines.
These long-range missiles will be deployed for:
1. Attacking PLAN warships from very huge distances away, effectively turning them into sea-denial weapons to prevent PLAN warships from even leaving their naval bases;
2. First-strikes against PLA military bases, stations and installations along the Chinese coastline and the inland regions of China, considering the range, which effectively reduces the strategic depth that the PLA could use; and
3. Most importantly, directly attacking the industrial sites and transportation infrastructures along the Chinese coastline and the inland regions of China, thus aiming to significantly impact China's war effort and war-waging potential.
In short, this wall wants to firmly lock China from even accessing the China Seas, let alone the WestPac. This is not yet excluding the possibility where these missiles could be employed as weapons of terror against the Chinese civilian population.
Besides, there is also the problem where the US Marines are working to disperse along the FIC using quick-action task forces, where they can set up temporary bases anywhere along the FIC to house and operate F-35Bs and long-range missile launchers. This would also complicates China's war-fighting effort, as more resources have to be put into finding and eliminating them on-time.
Hence, this situation (the proliferation of long-range missiles along the FIC) will become a huge, potent and acute strategic-level threat against China. This is with the background knowledge where in case China initiates AR over Taiwan, the US is definitely going to push those along the wall i.e. Japan, South Korea, Australia and the Philippines into becoming war damage sponges for the US against China.
Something seriously needs to be done in order to promptly and effectively address this acute problem for China. Things ain't looking good TBH...