Ding Chibiao (L), vice president of the Chinese Academy of Sciences (CAS), issues a responsibility letter to Liu Jifeng, director of the National Astronomical Observatories, in Beijing, capital of China, June 28, 2024. A ceremony was held on Friday at the National Astronomical Observatories under the CAS to receive the lunar samples collected by China's Chang'e-6 probe. China's Chang'e-6 mission collected 1,935.3 grams of samples from the moon's far side, the China National Space Administration announced on Friday. (Xinhua/Jin Liwang)