The idea of an antiship ballistic missile has taken root in Chinas military planning. The country is not only building more of its first version of such a weapon the DF21D but has developed an antiship warhead for another such missile the morenumerous DF26 billed as having a 2500mile range more than enough to hit Guam from several hundred miles inland in China. In theory that puts any naval adversary at risk long before it is in Chinese waters let alone within striking distance of China