The Chang'e 8 mission, in addition to scientific surveys and experiments, will test key technologies to lay the groundwork for the construction of a science and research base on the moon, Xinhua reported.
https://www.space.com/43000-china-moon-expl...earch-base.html
http://www.xinhuanet.com/english/2019-01/14/c_137743306.htm
http://www.esa.int/Highlights/Lunar_3D_printing
http://www.esa.int/Our_Activities/Space_En...ith_3D_printing
"3D printing works best at room temperature but over much of the Moon temperatures vary enormously across days and nights lasting two weeks each. For potential settlement, the lunar poles offer the most moderate temperature range."