Of course B2 wouldn't be the only platform/weapon US would use. Even B2s themselves would probably use short range stand off weapons. (id reserve long range stand off weapons to 52s and b1s, otherwise whats the point of having a stealth bomber?) To do the best of my knowledge, modern russian/chech/ukrainan etc radars can detect a b2 at a greater range than the radars Iraq or Serbia had. Problem is that such radars arent accurate and can't even remotely pinpoint the location but only give a broad area of where the plane is. Targeting radars are pretty much useless, since you have to get in almost a visual range in order to lock on a B2.
As for china's transport ships, 7 of their large LSTs must come on the beach itself (yukan class) but 11 of the Yuting class can flood their deck and launch amphibious tanks and boats. 4 more of the improved yuting class are to be delivered.
Of course if china invades it'd be stupid to send troops in ships before china has complete air superiority, complete sea control of the strait area, at least suppressed if not destroyed land based antiship systems. In my opinion, an airborne assault is almost certain before any shipborne assoult comes. Capturing and holding some runways close to the beachhead would be of great importance to china. I don't agree 24 hr period needed per batch of 10 000 troops (and some 200 tanks) that china is capable of ferrying at once, of course providing all ships are used and are not destroyed
Given the fuel ships have and the range to taiwan, i'd say its more like 12-14 hours per two way trip plus embarkment/disembarkment
