Would still need thousands of missiles. And that is only for a single city, China has 100+ cities with a population of over one million. With such a smaller industrial base, attempting to conduct strategic bombing via ballistic missiles is suicidal for the US. 1) China would produce much more missiles 2) a much greater of Chinese industrial targets would need to be hit than American industrial targets to achieve the same level of impact on industrial production.
I don't think the US would target all cities in China,hit just a few coastal cities will inflict enough damage on China, since China‘s economic and technological centers are all located along the coast such as Shenzhen shanghai hongkong. PLA general acknowledge this fact.
As for missile production. Yes, China can produce missiles much faster than the US,I already said that in previous post. But in the end,you can hit Japan Korea Taiwan as much missiles as you want the US won't care because it's not US soil. You can also hit Saipan Guam,but I don't the damage to the US by hitting those island,is even remotely comparable to the damage to China when shenzhen shanghai got hit


