The basic variant DF-21 had a range of 1,770+ km,[REF] and a payload of consisting of a single 500 kt nuclear warhead, with an estimated circular error probable (CEP) of 300~400 m; this version did not enter operational service [REF].
Revealed in 2006, the DF-21C is a terminally guided version[REF] that has a maximum range believed to be about [REF] and accuracy estimated to be 50~10 m [REF].