Staff members carry a box containing lunar samples retrieved by China's Chang'e-5 probe at the National Astronomical Observatories under the Chinese Academy of Sciences (CAS) in Beijing, capital of China, Dec. 19, 2020. A ceremony was held on Saturday at the National Astronomical Observatories under the CAS to receive the lunar samples retrieved by China's Chang'e-5 probe. (Xinhua/Jin Liwang)