China currently plans to send a rover to Mars in 2020 and, perhaps, do a Mars sample return mission in 2030. However, it feels that India, which China regards as its rival in an Asian space race, has stolen a march and has left the Chinese behind. China is now keen to try to play catchup with its own Mars mission.
One of the hold ups for a Chinese interplanetary exploration program is the delays surrounding the development of the Long March 5 rocket, which will be roughly the equivalent of the America Delta IV in its capabilities. The Chinese launch vehicle has slipped to at least 2015 because of the technological challenges it faces. The Long March 5 is also needed to launch the 20 ton modules of the Chinese space station, currently planned for later this decade."
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