Students look at the model of a lunar rover at No. 14 middle school in Guiyang, southwest China's Guizhou Province, April 24, 2020. Friday marked the fifth Space Day of China. [Photo /Xinhua]

A visitor takes a photo of a spacesuit at the provincial science and technology museum in Guiyang, southwest China's Guizhou Province, April 24, 2020. Friday marked the fifth Space Day of China. [Photo/Xinhua]

A teacher explains as students learn space knowledge at a school in Bijie City, southwest China's Guizhou Province, April 24, 2020. Friday marked the fifth Space Day of China. [Photo/Xinhua]