It doesn't have to be a given to have more attackers than defenders to succeed. Last several decades of warfare have proved it.
Also, for amphibous landings, one doesn't need huge numberical advantage. allies landed 'just' 120 000 soldiers during first 24 hours of d-day.
Numbers game is not most important anyway. Strategy, including deceptions, could change things a lot. One thing that has to be forgotten is the notion of concealed landing. while one could conceal the exact place and time of landing, the fact there is one in preparation is impossible to hide. I doubt chinese would even try to hide it.
Also, for amphibous landings, one doesn't need huge numberical advantage. allies landed 'just' 120 000 soldiers during first 24 hours of d-day.
Numbers game is not most important anyway. Strategy, including deceptions, could change things a lot. One thing that has to be forgotten is the notion of concealed landing. while one could conceal the exact place and time of landing, the fact there is one in preparation is impossible to hide. I doubt chinese would even try to hide it.