Four volunteers take the oath in front of the Lunar Palace 1, a facility for conducting bio-regenerative life-support systems experiments key to setting up a lunar base, in Beijing University for Aeronautics and Astronautics (BUAA) in Beijing, capital of China, May 10, 2017. A ceremony was held in the BUAA on Wednesday as 8 volunteers start a 365-day experiment in two groups in the Lunar Palace 1.
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