东方红-1(DFH-1) was China first ever Satellite, with homage
DFH became the family name of GEO Communication Satellite...
DFH-3(3.5 ton) and
DFH-4 (5.3 ton) are the current products of this family...but
CASC introduced the DFH-4 mainly on this event...
the baseline varient:
DFH-4-- the
Venesat is for the Venezuela launched on Oct 30 2008...
ZX-11 is another project based on DFH-4 platform...
the Enhanced varient:
DFH-4 Enhanced Platform...this would be increased to 6 ton class beyond the current CZ-3B/E LV's ability...
the Light arient:
DFH-4S
the All Electric Propulsion Platform-
DFH-4SP -- an very important project based on Electric Propulsion tech...
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the
DFH-5 is the next generation GEO Communication Satellite under development...6.5-9 ton class would be among the heaviest satellites in the world... the light varient would be launched by 3.5 stage formation CZ-7(1 sat) and 2.5 stage CZ-5(2 sat) in the future, the heavy varient(9 ton) could only be launched by the CZ-5...