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The Chang'e-3 mission is the second phase of China's lunar programme, which includes orbiting, landing and returning to Earth. China had launched its Chang'e-1 orbiter in 2007 and Chang'e-2 in 2010. The first probe retrieved a great deal of scientific data and a complete map of the moon, while the second created a full high-resolution map of the moon and a high-definition image of Sinus Iridium, a lunar landmark.