I overlook the word "commercial" there, but you obviously are poor of logic dont you?
First, this 200:1 ratio is applied both for China:US, therefore this ratio is applied for warship production. Do not ever think that 200 is including commercial for China while 1 is only warship for US, it will become irrational ratio/comparison, LOL. So China can produce military ship 200 times as many as US can now, period.
Second, the temporary shortage of sailor will be applied both for China and US likewise because both will loose a lot of warship and experience navy sailors.... so do not use error logic again saying only China will struggle while US wont
and dont imagine that the new sailors will be required within a month, because the warships production to operation will take years, so assuming the speed of training will be the same, at the end China still can produce more navy sailors than US.
China still import iron ore from Australia, but if Australia embargo China can shift the import source to Brazil etc, not to mention China's own deposit that she prepare to anticipate this kind of war.