06 July 2019
A portrait of Sun Zezhou, Chief Designer of China's Chang'e 4 lunar probe and Li Fei, key member of the Chang'e 3 and Chang'e 4 team, gives a glimpse of the challenges the lunar exploration team encountered. Chinese engineers began plans for the Chang'e 1 lunar probe in the 1990s, when Sun joined the team. China only had a monitoring system for near-Earth satellites, and communication with the moon at a distance of 380,000 km was still a big challenge. "When I first heard the old experts discussing lunar exploration in 1996, I felt the Moon was very distant," recalled Sun, who majored in monitoring and communication.
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