Image released by the China National Space Administration (CNSA) on Dec. 4, 2020 shows China's national flag unfurled from the Chang'e-5 probe on the moon. (CNSA/Handout via Xinhua) - According to the regulations, the lunar samples will be generally used for four purposes, namely permanent storage, backup permanent storage, research and public welfare. - About 80 percent of the lunar samples will be used for scientific research, and 20 percent.