Funding for this research was provided by:
Chinese Academy of Sciences (XDA15013800)
National Natural Science Foundation of China (51574216 and 51774264, 51771210)
China's Manned Space Station Project
Article History
Received: 8 July 2019
Accepted: 25 October 2019
First Online: 18 November 2019
Competing interests
: The authors declare no competing interests.