Are you sure about China not haveing nuke subs?
Today, six countries deploy some form of nuclear-powered strategic submarines: the United States, Russia, France, the United Kingdom, People's Republic of China, and India.[SUP][10][/SUP] Several other countries, including Argentina and Brazil,[SUP][11][/SUP][SUP][12][/SUP] have ongoing projects in different phases to build nuclear-powered submarines.
china has ZERO nuclear powered submarines. every god damned sub in their fleet is a diesel electric sub, NOT a nuclear sub.
they CLAIM they can mount nuclear warheads on the missile tubes of 4 of their diesel sub (the new yuan class) but that remains a matter of skepticism. they do NOT have any nuclear powered submarines and do not even have plans to build any.
nuclear powered subs are the only subs which can stand off in deep water without refueling, which was the key to the russian/american standoff. china's diesel powered subs have to surface constantly and have to refuel regularly they are NOT nuclear powered.
just because some wiki page or some journalist thinks "nuclear capable" (which is doubtful given china's warhead miniaturization, and missile programs are way behind the west, and even the russians) means "nuclear powered" that doesnt mean china will be sending subs under the arctic ice cap like the US and the soviets did in the 60's
diesel subs are preferred by the chinese because they are SNEAKIER than a nuclear sub when they go quiet. they maay only be able to stay down for a few hours but once they are down, they are harder to detect than a nuclear sub.
nuclear subs can be ANYWHERE, china's subs can only be within 200 miles of where they last surfaced. i find it highly unlikely that a chinese diesel sub could cross the pacific undetected to launch a missile (which would be an act of war) over LA for no reason other than to demonstrate that they have subs with missile launchers, because we already been knowing that, further the missiles that the chinese can put on subs are SHORT RANGE ONLY, with a ~90 mile range, shorter even than the silkworm 2. they do NOT have any ICBMs which can be launched from a sub.